Open-end Wrench (1973-1973.5):
Marking: "SELECTED SPECIAL STEEL" (more common, 1973 and 1973.5)
5 Wrenches: 8/9, 10/11, 12/13, 14/15, 17/19
Decal: no decal
Ends: Forged unfinished ends
Finish:
1964-1972 Satin Silver Finish
​ 1972-1975 Zinc Finish
​
Note: Can have either finish for 1973 Kits, Most kits I have seen has had a Zinc Finish, that looks silver or bluish-yellow depending on how the light hits it.
In the photographs to the left and below, you can see the comparison of the Satin Silver and Zinc Finishes side by side.​
​
From top to bottom:
DFS Wrench from 1969 Kit
SSS Wrench from 1974 kit (NOS)
SSS Wrench from 1976 kit​
​​​​​​​​​​​​
​​​​​​​​​​
​
​
​
​
​
​
Open-end Wrench: (another possible option presented in literature)
Marking: "DIN 895" "WEST GERMANY"
5 Wrenches: 8/9, 10/11, 12/13, 14/15, 17/19
Decal: no decal
Ends: Forged unfinished ends
Finish: Satin Silver Finish
​
Reference: Book by Drs. Gruber and Konradsheim