Rileysan:
Wow! Nice acquisition one-fell-swooping those body hammers.
Having gone through a very similar exercise with some Blue-Point body hammers I found a few years ago that seemed to exhibit a few different production eras, also wartime, by the way, I was curious enough to dip into the Craftsman catalogs, initially, just to see if I could follow what you're saying.
For what it's worth to you in your attempt to identify and date your hammers, I am following you about the shape of the handles being hexagonal in 1942 and round in 1947. But, I don't see any type of body hammer in your photos that wasn't offered in 1942. I do see one issue/anomaly.
Let me start with this.
In the 1942 catalog, page 43, a page after your Pic 4, note that the heads of the hammers are all the same: they all have a pronounced square knuckle for the handle, with the various business faces/tips (bumping, pecking, etc) ends forged on the ends of steel necks flaring out much thinner than that from there.
I don't have the 1947 catalog, but your Pic 5 looks identical to page 13 in the 1948 catalog. Note that there is no pronounced square knuckle. They all have that more curvaceous head with the eye for the handle simply bored in the middle.
All of your hammer heads have the 1942 or earlier style shape - except one: the light bumping hammer, 4th down from the top in Pic 1. But, I don't think that makes it postwar.
Here's where the anomaly (or what appears to be an anomaly to me) comes in. That light bumping hammer is shown on page 43, item (D), 4550, with a pronounced square eye knuckle. But, it is shown on page 42, in the mixed set, without being identified by name and part number unfortunately, with a more curvaceous head like all the postwar hammers.
Now go back and look at the 1941 catalog. The fender and body set on page 42 is only 11-pc (as opposed to 14-pc in 1942) and the figure is not showing a light bumping hammer. The light bumping hammer on page 43 has a pronounced square eye knuckle, just like it does in 1942.
Maybe, just maybe, they started updating the shape/style of their body hammer heads in 1942, and, by 1947, all the heads were rounded, as well as the handles. They used the same page 43 from the 1941 catalog in the 1942 catalog, but when they had to create a different figure for the larger mixed set on page 42, they rendered it with the newer style head. Again, it's the only head that looks like that (no square eye knuckle) on any body hammer on page 42 or page 43 in the 1942 catalog.
FWIW, I think what you have (using Pic 1, top down), all 1942 (or, at least pre-1947) is:
4580 Pecking Hammer (7 oz)
4556 Moulding Hammer
4552 Ding Hammer
4550 Light Bumping Hammer (10 oz)
4557 Pecking Hammer (15 oz)
4551 General Purpose Bumping Hammer (14 oz)
I could be wrong. Just trying to help. Again, terrific acquisition.