That box of tools is awesome.
LesserSon, by the comparison of V to U gullets, are you speaking about the head of the open end?
Yes, exactly. I’m trying to get a statistical handle on some things I’ve either ignored or taken for granted. I’d call it fact-checking, but my sample size is not huge, and is probably skewed by conscious and unconscious buying prejudices. Despite the “leave no Bonney behind” rule, I often do. I’m currently wrestling with a sighting of a big pile of post-WWII 3/4dr rats, breakers & sockets. I have absolutely no need for anything like that, so I didn’t even ask a price...but...
I have a set of full polish metric combo's which are a mix of both.
I’d like to see those. I have only one Full-Polish combo with a U-gullet (it also lacks Loc-Rite lobed broach.) I suspect it to be later than my twenty-one other F-Ps, all of which have V-gullets and Loc-Rite box ends.
That said, i prefer the V- gullets.
There’s a good argument for the V-gullet fitting snugly around hex heads and nuts. For wrenches made after WWII, it’s probably best. For early alloys and carbon steel, though, those sharp inside corners are a weak point that splays or tears under heavy torque. And pre-WWII, square heads and nuts were more common. (I actually think the square head/nut is superior for fastening flat components, as it spreads a load over more area, reducing deformation around the hole, and thereby less likely to pull through.)
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Following up my examination of Streamline and Outline combos...
I find Streamline underwent a subtle change from sharp corners along the grip to radiused corners in the last quarter of 1951. I have nine examples I judge to have sharp edges, eight of which have date codes AN(Jan1950)to LO(Dec1951). My lone outlier seems to be an HP(Aug1952), but the radiused-corner examples typically have more finishing, which can make forged-in detail like date codes less distinct, and what constitutes a sharp or radiused corner is subjective.
Twenty-eight examples have radiused corners, ranging from LO(Dec1951) to LW (Dec1959). Six more have radiused corners and no discernable date codes, which I take to indicate possible production after Feb1960.
I have eight Outline combos with date codes. On smaller sizes, the eponymious stamp can partially obliterate the forged-in date code, because of its location. Nevertheless, five of those eight are, or appear to be, AX(Jan1960). One is BX, and two more are X, with the first letter obliterated. All of these have U-gullets. Four more Outline combos also have U-gullets, but no trace of date codes.
I have three Outline combos with V-gullets. One has no other feature of interest, but the other two (1158A and 1159A) have a Triangle stamp, indicating production after Aug1967. One problem with my sample of Outline is, I just don’t buy them. They are mostly just a cost-reduction version of Streamline. One thing I do like about them: if you hang them by their box ends from hooks, pegs or nails, the size stamp is oriented so you can read it.