This is the ultimate guide to recognize the marks that identify any piece of valuable metal (silver, gold etc). There are over 17000 images all conveniently catalogued in categories to make your research even easier. Remember: only letter "A1" is unlocked by default. There is an in-app purchase to unlock all the other sections at once (letters, objects, animals, shapes etc). "Very helpful app!" - Jay Bone "Amazing - This app has been incredibly useful in identifying silver hallmarks for my vintage jewelry business !!!" - Smithwestalandvc If you choose to purchase Full Unlock Subscription, payment will be charged to your iTunes account, and your account will be charged for renewal within 24-hours prior to the end of the current period. Auto-renewal may be turned off at any time by going to your settings in the iTunes Store after purchase. The current subscription price is $0.99 USD/week. Prices are in U.S. dollars, may vary in countries other than the U.S. and are subject to change without notice. No cancellation of the current subscription is allowed during the active subscription period. If you don’t choose to purchase Full Unlock Subscription, you can simply continue using the app for free. Privacy Policy: https://BigBalli.com/privacy Terms of Use: http://www.apple.com/legal/itunes/appstore/dev/stdeula