Brt-366c. Wt = 1.82g. Diam = 14.8-15.1mm
Photo from Bob Johnston

Wt = 1.84g. Diam = ~14.6mm
Photo from Marudhar Arts, sale 36, lot 312

Wt = 1.78g. Diam = 14.2-14.7mm
Photo from Bob Johnston