2 3/4" X 3 7/8" (67mm X 95mm)

No markings

Picture courtesy Bill Ostrander

2 3/4" X 3 7/8" (70mm X 99mm)

(ear top incuse)

{Maker Unknown}

Picture courtesy Bob Berry

2 3/4" X 4" (67mm X 100mm)

(skirt inkstamp)

                        38

{Suisse Langenthal}

Picture courtesy Lis Bergman

2 3/4" X 4" (67mm X 100mm)

(ear incuse)

{Suisse Langenthal}

Picture courtesy Bob Berry