Reasons why coin & relic-diggers and collectors should buy a Digital Caliper (which measures in 1/100th or 1/1,000th-inch):
1- Bullet identification. As little as .02-inch can make a difference in a bullet's ID (US or CS or foreign, civil war or postwar).
2- Coin identification. A nearly unreadable (or completely unreadable) coin can often be identified by its precisely measuring diameter and thickness.
3- Button identification. Being a kepi-sized, cuff, vest, coat, or overcoat-size size Military button affects its rarity and value. Also, precise measuring can help you recognize a Reproduction one -- or a civilian "Fashion" button imitation of an actual Military button.
4- Buckle identification. Main reason is that solid-cast copies of Original buckles will be a few 1/00ths-inch smaller than the Original, due to shrinkage of the molten metal as it cools. Also, repro stamped-brass buckles, boxplates, and breastplates often do not PRECISELY match the exact size of Originals. Also, Military School plates tend to be smaller than similar-emblem Military ones.
5- Artillery ball or civilian-usage ball? Harbor Freight's 6" Long-Reach caliper (price is $19, see the link below) enables you to super-precisely measure balls up to 5.75-inches in diameter. It will tell you whether the ball you are about to buy is a genuine Artillery ball or a worthless civilian-usage Mill-Ball, Sports Shot-Put, ball-bearing, tank-cleaner ball, or Ornamental Ironwork ball.
www.civilwarartillery.com/shottables.htm
Please also read related information at
SolidShotEssentialsMod
Very good quality Digital Calipers can now be bought for $15 to $19, at Harbor Freight Tools stores (or online at
Search results for: 'caliper')
or on Ebay.
Any coin/relic digger-or-collector who is too cheap to pay $15 for CORRECTLY identifying bullets, coins, buttons, and buckles (and recognizing the Reproduction ones) deserves whatever misfortunes will result from refusing to use this very affordable (and repeatedly valuable) measuring tool.