Coin and Paper Money Collecting/Odd 1991 d

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Question
1991 d penny
1991 d penny  

Doubled rim and possible die crack over the first t in trust.
Doubled rim and possib  
I was wondering if you have any information about a 1991 penny from the Denver mint? It appears to be on a steel plachet. It weighs .24 grams and is very dark in color.

Answer
Cents struck from 1983 on were made on copper plated zinc planchets. The copper plating could have been missed, but the error can also be made after the coin was struck. Planchets for these coins are made by outside sources, and inspected twice. Once by manufacturer and one by mint prior to striking. Where your coin is circulated, it is quite hard to determine if it happened before the coin was struck. It may have been buried. Circulated examples like yours may bring from $5 to $15 to interested collectors.

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Ronald Fern

Expertise

I can answer most all questions relating to US coins, tokens, and currency. I'm not strong on world coins or ancients. Primary field of expertise is errors and varieties. Over 55 years experience in coin collecting. Part time dealer since 1976. Employed by McDonnell Douglas/Boeing for over 34 years as an Industrial Engineer/Technical Specialist before retiring in 2002.

Experience

Worked weekends for "Lonesome" John in the late 1960's to mid 1970's processing error coins, packaging, and preparing orders. Worked with John Devine and Fred Weinberg on several California Error A Rama's in the early 1970's. Served as display judge at annual Error-A-Rama coin shows. Opened and operated mail order coin business DBA "CAL ERRORS" in 1976. Contributor to Alan Herbert's "Official Price Guide To Mint Errors" and Fivaz/Stanton "Cherrypickers' Guide". Worked Saturdays at Huntington Beach Coin Exchange 1980-1999. Had table and sold coins at a number of coin and gun shows in So CA, AZ and NV. Sell coins, tokens and currency on Facebook. Past "Errorscope" Editor. Presently CONECA Examiner.

Organizations
ANA, CONECA, CWTS, NLG

Publications
Errorscope, Numismatic News, Civil War Token Journal, Error and Variety News

Education/Credentials
AA Degree LBCC pre Engineering, 1964 BS Degree CSULB Ind Technology, 1968

Awards and Honors
1st Place EAR Trophy for Civil War Token Errors, NLG Author of Year Award for best monthly coin column "Error News and Views" in small Numismatic paper, owned and published by Ray Anthony.

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