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Etched in History: Philippine Counterstamped, Countermarked and Chopmarked Coins
Philippine counterstamped, countermarked, and chopmarked coins are coins that bear additional markings or alterations intentionally added to their surface. These modifications were typically applied for specific purposes—such as validation, reissuance, or authentication—depending on the historical and geographical context.
My Koyns
6 days ago3 min read


The Manila Mint: A Turning Point in the Philippines' Monetary History
On March 19, 1861, the Manila Mint (Casa de Moneda) was inaugurated, marking the start of local gold coin production.
My Koyns
Feb 244 min read


Decoding a Japanese Yen Coin
Did you know that the Japanese have an intriguing coin dating system from what we're used to in most countries?
My Koyns
Oct 28, 20243 min read
Exploring the Fascinating World of Numismatic Shows
A numismatic show is an event where collectors, dealers, and enthusiasts come together to showcase and trade coins, paper money
My Koyns
Apr 28, 20243 min read


Philippine Commemorative Coins - Proof vs Matte vs BU
"Proof ka ba?"... "Inde Matte!"... "weh?"... "BU ka e!". If you search for Philippine commemorative coins online, you will often...
My Koyns
Jul 26, 20223 min read


Building Your First Collection
When starting your journey into the world of numismatics, it’s best to begin with a manageable and focused approach.
My Koyns
Jul 18, 20225 min read


Beginner's Guide to Collecting
Collecting coins, banknotes, and medals opens a world of history and artistry. Each item tells a story—reflecting historical events....
My Koyns
Jun 19, 20228 min read


How to Care for Your Collection
Caring for a numismatic collection is crucial to preserving the integrity and value of coins and banknotes over time.
My Koyns
Jun 15, 20224 min read
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