Brt-436b6. Wt = 2.32g. Diam = 19.7-20.2mm. Axis ↑↑

Stevens Collection (photo from Baldwin, Argentum sale Nov 2012, lot 296)

 

No weight or axis listed. Dashes in separator are very short.

Stevens Collection (photo from Baldwin, Argentum sale summer 2009, lot 90)