Airlock Cartridges
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Airlock Cartridges

version a)* U         ©1982, silver wraparound label, illustration, EL: white text, CART: smooth plastic with round casting mark on back

version b)* C          ©1982, silver wraparound label, illustration, EL: white text, CART: smooth plastic with no casting mark on back

version c)* C          ©1982, silver wraparound label, illustration, EL: white text, CART: rough plastic

NOTE: versions a, b, & c have the same main and end labels, but the cartridge itself is different