Zale 16B-1 patent, tip WK-1

Zale 16B-1 patent, tip WK-1

Zale 16B-1 patent, Wippermann

Zale 16B-1 patent, Wippermann

Zale 16B-1 patent, tip WK-2

Zale 16B-1 patent, tip WK-2