Brt-501m3. Wt = 5.80g. Diam = 21.5mm. Axis ↑↑

Photo from Bob Johnston

 

Wt = 5.84g. Axis ↑↑

Photo from Noonan 8th Feb ’23 (Puddester), lot 239

 

Wt = 5.82g. Axis ↑↑

Photo from Noonan 8th Feb ’23 (Puddester), lot 240