Hi
As you say, not listed in KM for this date, but I see that there are at least 7 different
types of 20
kreuzer being issued between 1756 and 1787, one of which (KM 255.1), for instance, is noted as being issued in 1765, 1773-5, 1781, 1783-5 and 1787: I suspect your date for KM 289 just hasn't been reported to
Krause yet, just as some of the missing years for 255.1 might turn up.
The legends read
ALEXANDER MARCH: BRAND: DVX BOR: (
Alexander, Margrave of Brandenburg, Duke of Prussia) and SECHZIG EIN FEIN MARK (Sixty [of these coins are made from] one pure mark [of silver])
[Edit: oops! should be (
as is plainly written on the coin): SECHZIG EINE FEINE MARK (I shouldn't try doing these things at 1:15 AM) The meaning is
still the same]
Hope this helps
Best wishes
Alan