Open-end Wrench:
Marking: LARGE Font "DROP FORGED STEEL" and "GERMANY"
5 Wrenches: 8/9, 10/11, 12/13, 14/15, 17/19
Decal: no decal
Ends (1969-1971): machined ends (most likely up to and including 1971 Cars)
Finish: Satin Silver Finish
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Ends (from 1971 - 1975): Forged unfinished ends
Finish:
1971-1972 Satin Silver Finish
​ 1972-1975 Zinc Finish
UPDATED 8/2024
In the photographs to the left and below, you can see the comparison of the Satin Silver and Zinc Finishes side by side.​
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From top to bottom:
DFS Wrench from 1969 Kit
SSS Wrench from 1974 kit (NOS)
SSS Wrench from 1976 kit​
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Open-end Wrench (1972):
Marking: "SELECTED STEEL" (most likely in earliest production in 1972)
5 Wrenches: 8/9, 10/11, 12/13, 14/15, 17/19
Decal: no decal
Ends: Forged unfinished ends
Finish: Satin Silver Finish