Brt-430c. Wt = 4.72g. Diam = 23.3-23.4mm. Axis ↑↑
Photo from Bob Johnston

Wt = 4.77g. Axis ↑↑
Photo from Noonan 8^th Feb ’23 (Puddester), lot 210

Wt = 4.5g. Diam = ~22.9mm. Axis not given.
Photo from Marudhar Arts, sale 37, lot 242