Hi Derk,
To me it is very clear that Gray was producing these wrenches for both Ford and Chev (GMC). The wrenches were produced with Gray's standard dies then the necessary Ford or GMC part numbers were stamped in.
For the GMC marked wrenches it is easier to find written references to them because Chev produced updated CMP Parts Lists until well into 1945 so these lists included the new wrenches (first introduced in 43). Unfortunately for the Ford wrenches I have only found the one reference (Ian's Tool Packing List) that actually gives part numbers for them.
Here is a list of the part numbers with descriptions:
Ford:
C39Q 17006 - 1/2" x 9/16" Box Socket Wrench
C39Q 17007 - 5/8" x 3/4" Box Socket Wrench
C39Q 17009 - 15/16" x 1" Box Socket Wrench
Chev:
5824673 - Wrench, Double end - Double offset Hex Box 15/16" x 1-1/16"
5824674 - Wrench, Single end offset - Hex Box 15/16" approx 14" long
5824675 - Wrench, Single end offset - Hex Box 7/8" approx 14" long
5824676 - Wrench, Single end straight - Hex Box 1" approx 14" long
5824677 - Wrench, Double end - Double offset Hex Box 1/2" x 9/16"
5824678 - Wrench, Double end - single offset Hex Box 15/16" x 1" approx 14" long (small end offset)
I know that C39Q 17006 and 5824677 are exactly the same wrench (pics attached).
The description of 5824678 completely matches an actual C39Q 17009.
By extension I suspect that the single end 15/16" Box Socket wrench (unknown part number) shown in the Ford Driver's Handbooks will be the same as 5824674.
I have attached images of C39Q 17006 next to GMC 5824677 and including a"077 Made in Canada". Somewhere I have a "078 Made in Canada 1/2" x 9/16" but it is currently misplaced. I included the "077" to illustrate the similarity with a normal production wrench.
Also there are images that show C39Q 17009 next to GMC 5824673 and a Gray-Bonney 2894 (this is not a CMP wrench but I believe that it nails down the manufacturer of the others).
The 5th image is a GMC 5824674 15/16" offset wrench.
I have been trying to collect examples of both the Ford and Chev wrenches. Perhaps we could conduct a trade?
For any one else reading this: Can anyone provide more info on Ford Box-End wrenches? I am interested to see pictures of any other types of surviving examples, identify correct part numbers from tool lists, or identify different size combinations from Driver's Handbooks.
Colin
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