A metal base was used first (with two types of lettering), followed by a plastic base.
Metal Base 1 "3"
Metal Base 1 "3"
Base Metal 1:
Metal base with number "53647" and a single digit cavity number. Thin numbers. I need more data to find how long it was used. This base came first.
[Single digit number] 53647
Metal Base 2 "2"
Metal Base 2 "2"
Base Metal 2:
Metal base with number "53647" and a single digit cavity number. Thick numbers. This base came second. I need more data to determine when they started using this base. Used up through ca. 1970.
[Single digit number] 53647
Plastic Base "6"
Plastic Base "6"
Base Plastic:
Plastic base with number "58055". Used starting ca. 1971.
