Brt-1732b3. Wt = 11.50g. Diam = 19.3-20.3mm. Six-point star

Photo from Bob Johnston

 

Brt-1732b3. Wt = 11g. Diam = 16-18mm. Eight-point star

Photo from Zeno posted by Alex Naumenko (from George Regal (mti))