3 1/8" X 1 1/8" (81mm X 27mm)

3 1/8" X 1" (81mm X 25mm)

3 1/8" X 1 1/8" (81mm X 27mm)

No markings

Pictures courtesy Connie Dueker

3 1/8" X 1" (81mm X 25mm)

(embossed) KNOX    KNOX

Pictures courtesy Bob Berry

3 1/8" X 1 1/8" (81mm X 27mm)

3 1/8" X 1 1/8" (81mm X 27mm)

No markings

Pictures courtesy Connie Dueker