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Mildly interesting spiral pattern on these 1881-A 1 Marks
I was the winning bidder on an MS66 1881-A 1 Mark at Stack's yesterday. I found it interesting that it has the same spiral pattern as my MS64 1881-A 1 Mark that it is replacing. I'm not positive if I have it on any of my other "A" mintmark 1 Marks of the same type. It must be a by-product of how the planchets were prepared… -
Re: Mildly interesting spiral pattern on these 1881-A 1 Marks
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Re: Mildly interesting spiral pattern on these 1881-A 1 Marks
Of possible interest - the 4th edition of Meyers Lexikon (German encyclopedia published 1884-90) provides a general overview of the contemporary minting process and illustrates some of the machines used. Its viewable online both in scanned and text-only formats (which greatly aids online translation):… -
Re: Mildly interesting spiral pattern on these 1881-A 1 Marks
Usually any roughness on the planchet gets obliterated during striking, especially in the fields. -
Re: Mildly interesting spiral pattern on these 1881-A 1 Marks
Could be die polish. This is one reason I like to use a high powered glass and a microscope. edited to add- look for the raised lines. Imperial German coinage is known for die polish- as is the coinage from the years of the Weimar Republic -
Re: Mildly interesting spiral pattern on these 1881-A 1 Marks
That is a curious pattern and not something I have seen (or noticed) before. I wonder if the pattern could relate to operation of a knurling machine. My understanding is the raw planchets would have passed through this machine to compress and smooth the edge prior to embossing. Whether the frictional forces involved in… -
Re: Mildly interesting spiral pattern on these 1881-A 1 Marks
Edit: actually, they don’t look like lathe lines. They’re similar to the planchet rings commonly found on ZAR South African coinage, which was also produced on Berlin mint machinery. This characteristic can be found on various types struck with Berlin mint machinery and is a remnant of some part of their planchet… -
Re: Mildly interesting spiral pattern on these 1881-A 1 Marks
yep, I can see it on that blow up -
Re: Mildly interesting spiral pattern on these 1881-A 1 Marks
I think the lines are from the die as I do not see any remnants on the struck coin devices. -
Re: Mildly interesting spiral pattern on these 1881-A 1 Marks
you got that at a good price :)
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