Mog-6808. Wt = 11.65g. Diam = 25.7-26.3mm
Photo from Bob Johnston

Wt = 11.55g. Diam = ~25.3mm
Photo from Amit Mehta

Wt = 11.67g. Diam = ~25mm
Photo from Amit Mehta

Wt = 11.67g. Diam = ~25.6mm
Photo from Amit Mehta