Brt-410. Wt = 9.42g. Diam = 26.6mm. Axis ↑↑

Photo from Bob Johnston

 

Wt = 9.59g. Diam = 26.8-27.0mm. Lack of dot after XX not clear

Stevens Collection

 

Wt = 9.21g. Diam = 26.5-26.7mm. Axis ↑↑

Stevens Collection (photo from Baldwin, Argantum Autumn 2012, lot 291)