Mog-5640. Wt = 13.68g
Photo from Steve Album, list 265, No. 55644

Wt = 13.85g
Photo from Zeno 277904 posted by Lingen (from Abhishek Chatterjee)

Wt = 13.38g. Diam = ~22.5
Photo from Zeno 165090 posted by Lingen