About 20mm. I checked against Afghanistan, Saudi Arabia, Iraq, Iran, & Yemen (the Toughra suggests Ottoman to me) but have drawn a blank:
Bump. Is there any reason that this doesn't belong in the SCD series? I'm trying to remember the lower limit on the diameter to qualify.
Sounds about right. I'm trying to get inexpensive but clean examples of the series & find it pretty amazing that I can get such obscure 180 year...
The verdigris on the counterstamp isn't particularly noticeable in hand - I think it may simply be an artifact of how the struck surface reflects...
I recently picked up a 1976 $1 from Singapore. I bought it thinking it was circulating currency, only to find out that the exact same design was...
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