3 5/8" X 1 1/8" (91mm X 28mm)

3 5/8" X 1 1/8" (92mm X 28mm)

3 5/8" X 1 1/8" (91mm X 28mm)

(embossed) PYREX / MADE IN U.S.A. // PAT. 1700066

Pictures courtesy Connie Dueker

3 5/8" X 1 1/8" (92mm X 28mm)

(embossed) PYREX 290

Pictures courtesy Connie Dueker

Box the Pyrex versions were sold in

3 5/8" X 1 1/8" (92mm X 28mm)

3 5/8" X 1 1/8" (92mm X 28mm)

(embossed) A.G.K.

Pictures courtesy Connie Dueker