Coin Identifier

Tuğberk Can Özen

Founder, OBZENA LLC
LinkedIn

Tuğberk Can Özen is the founder of OBZENA LLC, a Wyoming, USA company that builds AI image-recognition apps, including Coinara, the coin identification app this site links to.

The guides on Coin Identifier are written and edited with the help of AI drafting tools, working from PCGS and NGC references, auction records and mint publications. Tuğberk is not a professional numismatist or appraiser, and the price ranges on this site are estimates, not appraisals. How the content is made is explained on the How we create content page.

Areas covered
Coin IdentificationValues & PricesError CoinsUS CoinsWorld & Ancient Coins

Articles by Tuğberk Can Özen, page 2

Weimar Republic silver five Reichsmark commemorative coin on neutral studio surface showing detailed eagle reverse and soft cabinet toningWorld & Ancient CoinsGerman Reichsmark and Pfennig Coin Collecting GuideGermany issued Reichsmark and Pfennig coins from 1924 to 1948. Mint marks reveal the maker, and silver issues hold most collector value today.Macro photograph of a Canadian colored circulation coin showing a vivid red poppy on a quarter reverseWorld & Ancient Coins16 Modern Canadian Colored Circulation Coins Worth MoneyModern Canadian colored circulation coins start at face value. The best examples reach $50 to a few hundred. Color, condition, and errors drive premiums.Ancient Roman bronze coin and medieval hammered silver penny side by side on a neutral studio surfaceWorld & Ancient CoinsAncient vs Medieval Coins: Identification DifferencesThe main difference is era and method. Ancient coins were struck by hand before 500 AD. Medieval coins followed, using hammered dies through the 1400s.Macro photograph of a counterfeit cast silver coin showing surface pitting and a faint edge seam lineCoin IdentificationHow to Identify Counterfeit Cast Coins: Pitting, Edge and Surface MarkersCast counterfeit coins show pitting, seam lines, and soft detail. Genuine struck coins almost never do. Here is how to spot the difference.Ancient Roman silver denarius coin showing emperor portrait and reverse deity on neutral studio surface macro detailWorld & Ancient CoinsAncient Roman Denarius Identification: Beginner's Complete GuideA Roman denarius is identified by its portrait, legend, and silver weight. Republican coins differ from imperial issues. Style and metal confirm the date.Array of valuable world coins including a British gold sovereign Mexican eight reales and ancient Greek silver tetradrachm on neutral studio surfaceWorld & Ancient Coins20 Most Valuable Foreign Coins American Collectors WantThe most valuable foreign coins include British, Canadian, and ancient rarities. Date, mint, and metal decide each coin's true value.Macro photograph of a 1958-D Lincoln wheat penny showing the L in LIBERTY positioned near the raised rimUS CoinsHow to Identify a 1958-D L on Rim Wheat Penny VarietyThe 1958-D L on rim variety shows LIBERTY's L touching the coin edge. It forms from die or collar wear. Most examples sell for a few dollars.Authentic ancient Roman silver denarius on neutral studio surface showing detailed emperor portrait and reverse deity designWorld & Ancient CoinsHow to Identify Authentic Roman DenariiA real Roman denarius weighs about 3.9 grams in silver. Genuine strikes show hand-cut dies and honest toning. Cast copies reveal seams and mushy detail.Close-up macro photograph of a 1969-S doubled die obverse Lincoln cent showing bold inscription doublingError Coins1969-S Doubled Die Lincoln Cent: Complete Identification ReferenceThe 1969-S doubled die cent shows bold obverse doubling with a single S mint mark. Genuine examples sell from $25,000 to over $100,000.Macro photograph of a silver coin with tape residue partially removed showing clean reflective surface detailValues & PricesHow to remove tape damage from coins without lowering valueThe safest way to remove tape damage from coins is a pure acetone soak. Acetone dissolves adhesive without altering the metal or lowering value.Genuine 1909-S VDB Lincoln cent reverse showing wheat ears and VDB initials in sharp macro detailCoin IdentificationHow to Spot a Real 1909-S VDB Lincoln Cent vs Common CounterfeitsA genuine 1909-S VDB Lincoln cent has a small serif S with a raised dot inside its top curve. Most fakes are added-mintmark jobs on common 1909 cents.Australian Silver Kookaburra one ounce coin reverse showing perched kookaburra struck by the Perth Mint in studio lightWorld & Ancient Coins16 Most Valuable Australian Kookaburra Variants for CollectorsThe most valuable Australian Kookaburra coins are early Perth Mint dates and privy-mark editions. Mintage, size, and grade decide every premium.
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