1921 UK One Penny With Streaks - Coin Community Forum

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Author	Replies: 9 / Views: 71
lahave56 Valued Member Canada 114 Posts	Posted Today 7H 8M ago At first I thought this might be a UK Woody but according to Numista it should be 100% Bronze so I'm wondering if this is some other kind of PMD. It is 30.8 mm and 9.2g so that seems fine. Hoping someone will educate me. Report this Post to the Staff

PlumCrazy814 Pillar of the Community United States 901 Posts	Posted Today 6H 15M ago no clue here but guessing environmental from something acidic Report this Post to the Staff
HondoB Bedrock of the Community United States 25602 Posts	Posted Today 5H 28M ago Quote: 100% Bronze Bronze is an alloy, not an element. The UK had issues with their bronze in 1921. We had a discussion about that within the last year or so. A search should turn something up. Here's one of mine that I posted then (12/2025). Inordinately fascinated by bits of metal with strange markings and figures Report this Post to the Staff
lahave56 Valued Member Canada 114 Posts	Posted Today 5H 21M ago Thanks PlumCrazy814 and HondoB I'll look for the discussion Guess it's a good thing I didn't choose metallurgy for my career can't believe I missed that Report this Post to the Staff
NumisRob Bedrock of the Community United Kingdom 18007 Posts	Posted Today 5H 10M ago I am old enough to remember these pennies in circulation, and lots of early George V pennies were streaky. They were still common finds right up to Decimalization in 1971. My Trade List: https://goccf.com/t/194596 My Wants List: https://goccf.com/t/191710 Report this Post to the Staff
ijn1944 Bedrock of the Community United States 19237 Posts	Posted Today 4H 46M ago Yes, a metallurgical issue. Nice example! Report this Post to the Staff
lahave56 Valued Member Canada 114 Posts	Posted Today 4H 38M ago Quote: They were still common finds right up to Decimalization in 1971 Thanks NumisRob - guess it's a conversation piece then 1921 was the peak year in mintage of these coins at 129.7M Report this Post to the Staff
lahave56 Valued Member Canada 114 Posts	Posted Today 4H 36M ago Quote: Nice example! Thanks ijn1944! Report this Post to the Staff
lahave56 Valued Member Canada 114 Posts	Posted Today 4H 8M ago Quote: Yes, a metallurgical issue. ijn1944 do you know any more about the metallurgical issue? I haven't found HondoB's reference yet so maybe it was discussed there. I did find that there were striking issues with the obverse design of this coin that ultimately led them to modify the bronze alloy mix beginning with the 1923 issue. Other than that I haven't found anything. Was it a mixing issue or maybe the constituent elements were not of the correct purity that led to the streaking issues? Just curious if you know. Report this Post to the Staff
NumisRob Bedrock of the Community United Kingdom 18007 Posts	Posted Today 2H 6M ago These coins were plagued by 'ghosting' - the very high relief portrait of King George V could often be seen, inverted, on the much lower relief reverse. Maybe the alloy mixture was connected with the attempts to reduce the ghosting. No pennies were issued for circulation in 1923-5. In 1926 the effigy on the obverse was modified, and in 1927 the reverse was also modified and the figure of Britannia was slightly reduced in size. Finally from 1928 a much smaller bust of King George V was used, which finally stopped the ghosting. My Trade List: https://goccf.com/t/194596 My Wants List: https://goccf.com/t/191710 Report this Post to the Staff
	Replies: 9 / Views: 71

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