MB399579 wrote:Thanks Wingnutt for the help !
Glad to oblige!
I have also been very intrigued by Greg's '41-W-900' marked wrench set (as well as the '41-W-900' marked 13/64 x 15/64 wrench found in Hartofoak's Duro-Chrome
E-series set) since the first time I saw them right here on this thread, not only for the '41-W-900' marking, but for their very unusual construction
, which nobody here has mentioned or discussed as far as I can tell.
Dovetailing off your interest into Luca's query, I will discuss it a little.
Notice that the wrenches are more or less flat (with no rounded edges) and they have no true heads. Or better said, that the heads or ends are of the same exact thickness as the shanks, with no visible separation between them (heads and shank). Each wrench is one contiguous solitary piece. The size markings cannot be said to be placed on the head or the shank. They are placed as if there is no difference. To me this gives them the same appearance as wrenches that have been stamped from a single sheet of soft steel, then hardened and tempered.
This method is referred to by Alloy Artifacts as "stamped construction" or "stamped-steel construction."
Examples of this construction can be found from all the major manufacturers, including Bonney, Williams, and Duro-Chrome
/Indestro, just to name a few. However, all the examples are single or double open-ended engineer's wrenches or nut & tap wrenches, and, most importantly, can be dated to the 1910's, 20's and 30's, but no later. A good example is the open-ended wrench in Figure 65 of the Mossberg section.
I have not found a single ignition wrench of this construction on AA, of any era, and not any wrench of this construction dated later than early 1930's. By then, most major wrench manufacturer's had moved into carbon steel and alloys and the forged consruction of shanks with massive parabolic heads that we are more familiar with. As far as I can tell, all of the ignition wrenches (as can be seen above in the Duro-Chrome
E-series) illustrated and detailed in AA were constructed using the more modern method.
Given the FSN marking on the Hines/Hartofoak wrenches, I find this seeming incongruity (between the era of stamped-steel wrench construction and what we know - or think we know - about FSN markings) VERY
strange, to say the least.