Unless dated, old baseball photos can offer only a guess as to when they were taken.  An autographed team ball, when all players are represented, can often be pinpointed to a specific month, week or sometimes even a day.

Stars, semi-stars, and common players are all represented equally.  In fact, the autographs of many commons may be harder to come by individually than many stars. While the accomplishments of a team in a given season can be dubious like the 1988 Baltimore Orioles or glorious like a World Series champion Yankees signed ball, the ball autographed by a team represents those accomplishments equally.

Usually, the absence of a signature by a player can help define when a ball was signed due to the date of the transaction either by trade or free agency. Of course, the more stars or Hall of Famers on a ball will result in a greater value and a higher price.

Finding an authentic team signed baseball in great condition can be a bit of a challenge. Because of the nature of the item, if all team members attempt to sign the ball right after one another smudges and smears are likely. These defects not only affect the value of the ball, but may also make authentication nearly impossible.

Depending on the price of the ball in question, a buyer may seek to have a third party authentication service certify the team signed baseball prior to completing purchase. However, a higher valued ball, for example the 1927 Yankees, will likely already have the necessary documentation proving its authenticity. One guideline however, a certificate of authenticity is only as good as the company providing it. Collectors should recognize the name, and perform some research before spending a lot of cash.   PSA/DNA, James Spence and others do a generally fine job with authentication.

Team signed baseballs are a great way to recall a World Series year, a record year for wins, or other team accomplishment. Because collectors have favorite teams and favorite players, this type of collectible benefits both desires. Sometimes just reading the names (though handwriting is sometimes questionable) can help a collector recall each individual player and the ups and downs of a baseball campaign.

The nostalgia can be somewhat overwhelming ten years down the road, as these great snapshots of history capture every player that was on the team at that specific moment.  Signed team baseballs make for a terrific collecting focus, whether you’re collecting All-Star teams, World Series winners, specific teams or those from baseball’s storied past.

One of the major reasons for the sustainability of these items is the uniqueness and value of each and every baseball. Some of the factors that contribute to this include the player who signed the ball, how many signatures are on it, and the theme of the baseball in the case of multiple signatures.

The single most important factor in determining the value of a Hall of Famer signed baseball is the player who signed it. Currently, the most in demand autographed baseball is the single-signed Babe Ruth, often considered the “Holy Grail” among collectors. While there are many of them available in today’s marketplace, the value of an authentic Ruth signed baseball continues to skyrocket. This is due his legendary status in the sport, as well as an increased number of forged Ruth baseballs in circulation. These forgeries were created to take advantage of increased prices of Babe Ruth signed baseballs, but ended up raising the prices of the authentic signed baseballs even more.

For many Hall of Fame collectors, the value of a single-signed baseball is preferred over a multi-signed ball. While logic may dictate that more Hall of Fame signatures on one ball might be worth more, this is not the case. The value of a baseball is directly affected by its collectability, and baseballs signed by big names are worth more if there is more demand for them. With signed baseballs, there are usually many more collectors of a specific Hall of Famer than there are collectors of Hall of Fame players in general. As a result, the demand for the single-signed baseballs is greater than the multi-signed baseballs, and therefore more valuable.

However, multi-signed baseballs can also have increased values if they were created around a particular theme, such as a team-signed ball. A team-signed baseball is one that is signed by a specific team from a specific year, allowing for a few discrepancies due to mid-season roster changes. The inclusion of marquee signatures, the placement and quality of those signatures, and the condition of the ball, all directly affect the baseball’s value.

Other popular and valuable themes for multi-signed baseballs include the aforementioned Hall of Famers theme, as well as  All Star teams, World Series winners and specific individual achievement themes, such as the 500 Home Run Club, and 300 Wins Club.

As the Hall of Fame continues to add to its roster with a name or two each year, baseballs signed by those players take on added value as members of the most coveted fraternity in baseball.  It’s a special group–still relatively small–and for collectors, the ultimate focus.

The ball had originally been presented to former Washington Senators’ manager Mickey Vernon during one of JFK’s opening day first pitch tosses between 1961 and ‘63. The family of the late big leaguer consigned the ball and a number of other items to the auction.

The final bid, including a 15% buyer’s premium, was $26,450.

The ball was personalized to Vernon and had faded a bit over the years.

A game bat signed by Joe DiMaggio and presented to Vernon in the early 1950s, sold for $35,650, the top price among the 800+ items sold by the auction house.

A baseball in superior condition, signed by Mickey Mantle and Roger Maris brought $15,306 while a ball signed by 13 members of the 1930 Yankees including Babe Ruth and Lou Gehrig, sold for $9200.

While signed baseballs from Kennedy are extremely rare, players like Mantle signed thousands–especially after their playing days ended. Mantle was a regular on the sports card show circuit throughout the mid-1980s to early 90s.

Despite the large number of signed Mickey Mantle baseballs on the market, the demand still outweighs the supply in most cases. Mantle balls are among the most counterfeited, however, so collectors and fans are encouraged to buy only those carrying professional authentication.

Sweet spot signatures do tend to sell for a premium in the market. Most collectors prefer non-personalized autographs in case they want to re-sell at a later date, but players are sometimes insistent because they don’t want their autograph re-sold. It may not affect the grade of a baseball if you have it authenticated, but it may hurt the resale value if it’s made out “to Tommy”.

Always use a high quality ink pen when obtaining signatures. Don’t use a Sharpie like you would on an 8×10 photograph, bat or jersey. It won’t smear if handled correctly and the autograph shouldn’t bleed.

What type of baseball should you use to get the autograph or look for when you’re buying one? Typically, a signed Official American or National League ball will sell for more than an ordinary ball. There are various types of balls that are used to acquire signatures. They’re relatively inexpensive, available at better sporting goods stores or online and will hold your autograph better than a cheaper ball.

Should you coat your autographed baseball with anything? At one time, shellacking was a very common method of attempting to preserve autographed baseballs. According to authenticator PSA/DNA, “if the extent of the shellacking is light and does not affect the eye-appeal greatly, a baseball may still achieve a grade of “7″ but no higher”. A ball that has been shellacked may show cracking over time, which will impact its value. Of course, it’s not possible to undo the shellacking and it’s common knowledge that many older balls will exhibit this.

Since plastic autographed ball holders weren’t available for most of the last century, coating a ball was one way to preserve it, but later on, putting it in a drawer, wrapped in a plastic baggy or sock was another way fans and collectors saved them.

Removing signatures has become a modern era practice employed to turn a multi-signed ball with some lesser names into a more valuable single-signed ball. If a grading company determines that one or more signatures have been removed from a ball, that ball can no longer qualify as single-signed ball. Be sure to examine the ball closely to see if any names have been removed.

Another thing to keep in mind about signature preservation. Beware of the 1984-1990 baseballs carrying the signature of AL President Bobby Brown. The baseballs with “Haiti” placed under the Rawlings logo stamp were made without using distilled water that has permitted enzymes to potentially change the color of the ball as time passes. These balls often contain a yellowish-brown color.

You can check out  autographed baseballs on eBay to see what’s available.

Among the items up for bid will be a Hall of Famers Single Signed Baseballs Collection (56) Including Campanella, DiMaggio and Mantle autographed baseballs.

This collection of 56 single signed OAL, ONL, and OML balls each bears either a blue or black ballpoint autograph from a Hall of Fame inductee. The spheres are moderately toned to white examples, with the scriptings averaging “7-9”. Signed baseballs include: Aaron, Campanella, DiMaggio (“HOF 55”), Drysdale, Koufax, Mantle, and Musial. Minimum bid $1,500.

1934 Tour of Japan Vintage Signed Baseball (16 Signatures) Including Ruth, Gehrig, Foxx and Berg. The autographed baseball boasts sixteen black ink “Tour” signatures averaging about “5-8″ in terms of strength and clarity. The ball’s sweet spot is occupied by Babe Ruth (“6″). On other panels are Cascarella (Joe), Frank O’Doul (“7″), Lou Gehrig (“7-8″), Whitehill (Earl), Connie Mack (“7″), Moe Berg (“7″), Rabbit Warstler, Doc Ebling (trainer), John Quinn (umpire), Clint Brown, Eric McNair, Frankie Hayes, Jimmie Foxx (“8″), Lefty Gomez and Earl Averill. Minimum bid $1,000.

1914 New York Giants Team Signed Ball (10 Signatures) Including Mathewson, McGraw and Thorpe. Signature highlights on this unofficial “National League” ball include Christy Mathewson, John McGraw, Jim Thorpe and Chief Myers (signed “J.T. Myers”). All have significant fading, with Mathewson rating “2-3” strength, Myers projecting “2”, and McGraw and Thorpe assessing “1-2”. Most of the other names have faded into obscurity. Finding Mathewson’s signature on a team ball—let alone acquiring the ball—can constitute a lifelong quest for the most ardent collector. Minimum bid $1,000.