2 1/4" X 3 1/4" (55mm X 80mm)

(dome incuse)

(dome inksamp) 10    

{Maker unknown}

Picture courtesy Bob Berry

2 3/8" X 3 1/4" (58mm X 80mm)

No markings

Picture courtesy Bob Berry

2 3/8" X 3 1/4" (58mm X 80mm)

No markings

Picture courtesy Bill Ostrander