German coin error

silverpop

this 1978 German 10 Improper alloy 10 pfennig is one of the interesting coins in my world coins

bought this some years ago from the local coin shop's junk box

JCMhouston

Cool, I do love the wood grain look from improperly mixed alloys, especially on copper.

silverpop

very nice error there JCMhouston

it's amazing how these coins got into the hands of the public seeing that they are noticeable errors

lordmarcovan

How to tell an incorrect alloy on the German piece? In the pictures, it doesn't look quite as brassy golden color as a normal one would, I suppose, and there's that unusual toning, but otherwise, I wouldn't have noticed. Is it more silvery color than brassy color?

silverpop

The stripes are a dead giveaway to improper alloy mix

YQQ

Am very curious about that improper mix.
There are a lot of Canadian Large cents from 1905 to 1920 which have that peculiar wood grain. some have it very strong, others not so bold.
knowing little about metal properties. Logic would let me think / assume there should be more than one piece of a batch having the same wood grain look.
When the alloy was mixed, then IMO, the whole batch should be alike with the wood grain look? perhaps I am wrong?
I know, the Canadian coins are plentiful.
I have never seen this on a German Coin, either war time or post war. But, perhaps I never recognized it as what it is.?

pmac

The composition of this coin should be brass clad steel. Is it magnetic?

silverpop

1978 F German 10 Pfennig

KM#108

made of brass plated steel

weight-4g

21.5 mm

mintage-105,000,000

magnetic attraction

ID from coin shop as improper alloy mix