Tuğberk Can Özen

Founder, OBZENA LLC

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.

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Articles by Tuğberk Can Özen, page 3

Uncirculated 1948 Canadian voyageur silver dollar displayed on neutral studio surface showing key date varietyError Coins18 Canadian Silver Dollar Varieties Worth Money 1935 to 1967The 1948 voyageur is the key Canadian silver dollar, worth thousands today. Varieties from 1935 to 1967 hide real money. Learn how to identify each one.Mughal silver rupee coin with Persian calligraphy inscriptions photographed on neutral studio surface for numismatic identificationWorld & Ancient CoinsIndian Mughal Coin Identification for CollectorsMughal coins are identified by Persian inscriptions, mint name, and Hijri date. Gold mohurs and silver rupees carry the emperor's name in calligraphy.Pre-1965 silver Washington quarter on neutral studio surface with sharp macro luster detailCoin IdentificationHow to Tell if a Coin is Silver: 4 At-Home Tests That WorkThe quickest silver test is the ice cube method, because silver conducts heat faster than any other coin metal. Pre-1965 US dimes contain 90 percent silver.Morgan silver dollar in PCGS slab on a neutral consignment desk surface for auction house comparisonValues & PricesHeritage Auctions vs Stack's Bowers: Where to Sell Rare CoinsHeritage Auctions delivers higher volume with stronger online reach. Stack's Bowers commands premium results for true rarities and pre-1850 material.A single rare US silver dollar displayed on a neutral studio surface for an online coin auction house comparisonValues & PricesLive Auctioneers vs Heritage vs Stacks Bowers: Online Coin Auction ComparisonHeritage and Stack's Bowers vet and guarantee coins. LiveAuctioneers aggregates many small third-party sellers. Match the online coin auction to your budget.Close-up macro photograph of a modern US Mint error coin showing a dramatic off-center strike on neutral studio surfaceError Coins22 Most Valuable Modern US Mint Errors of the 2020sThe most valuable modern US Mint errors of the 2020s are wrong-planchet and off-metal strikes. They can sell for thousands of dollars at auction.Vintage Lincoln wheat cent with brown copper patina and wheat ears reverse on a neutral studio surfaceUS CoinsWheat Penny Identification Guide: 1909-1958 Year-by-YearWheat penny identification covers cents struck from 1909 to 1958. The date and mint mark sit below the year. The 1909-S VDB leads the key dates.Canadian one-dollar loonie coin showing the common loon reverse design in sharp macro studio detailError Coins16 Canadian Loonie 1 Dollar Errors and Varieties Worth HuntingThe rarest Canadian loonies are dramatic mint errors and low-mintage commemorative years. Strong examples can sell for several hundred dollars at auction.Close-up of New Brunswick and Nova Scotia pre-Confederation coins professional numismatic photography 2026 collector reference guideWorld & Ancient CoinsNew Brunswick and Nova Scotia Pre-Confederation Coins IdentificationBefore joining Canada in 1867, New Brunswick and Nova Scotia struck their own cents and half cents. Identify them by the province name, the date and the Victoria portrait, then check the grade.Close-up of a Canadian quarter, blank planchet missing caribou design. professional numismatic photography 2026 collector reference guideError CoinsHow to Identify Canadian Blank Planchet Quarter Errors (Missing Caribou)A Canadian blank planchet quarter was never struck, so both sides are smooth with no caribou and no portrait. Check the weight, diameter and raised rim to tell a genuine mint error from a coin that was ground or damaged.Photorealistic image of a double die coin error, highlighting overlapping designs. professional numismatic photography 2026 collector reference guideError CoinsWhat is a Doubled Die Error and How to Spot OneA doubled die error happens when the die itself receives a doubled image, so every coin it strikes shows doubled letters or numbers, as on the 1955 Lincoln cent. Flat, shelf-like doubling is machine doubling and adds no value.1871 Prince Edward Island penny with detail on obverse and reverse design featuresWorld & Ancient CoinsPrince Edward Island 1871 Penny Identification and Value GuideThe 1871 cent is the only coin Prince Edward Island issued, struck two years before the island joined Canada. Values depend on grade and colour, so identify the coin and grade it before you price it.
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