I agree with numista here, as that coin is at 24mm, mine is at 30mm, so that can't be it, although made of the same material I believe 
I'm beginning to suspect this is an un-struck 5 mark denomination?

I'm beginning to suspect this is an un-struck 5 mark denomination?

Edited by mrwhatisit
01/01/2024 10:57 pm
01/01/2024 10:57 pm