I recognized that design right away. Very unique and I only have one example.
Following is from AA, but they don't mention anything about the logo.
New Britain "Double-Groove" Panelled Style
One of New Britain's more distinctive wrench designs featured forged panels with two deep grooves along the handle. These wrenches were produced in open-end, tappet, box-end, and combination styles, and all were assigned NDF-xxx model numbers. Most of the known examples have a plain steel or black oxide finish, but some have chrome plated finishes. We'll call this the "Double-Groove" wrench style, for lack of a better term.
The production dates for this style are somewhat uncertain, but the midpoint time appears to be the late 1940s. Catalog 57M from around 1947 shows the Double-Groove style in most of its wrench illustrations, and in addition, New Britain magazine advertisements from the late 1940s show the Double-Groove style for wrenches. The earlier 56M catalog from 1940-1941 shows the NDF-series wrench shanks with a single panel or rib, which is probably the earlier "Ribbed" style shown in previous figures. By the time of catalog 58 in 1952, New Britain had switched to a simpler flat-shank style for its wrenches, presumed to be the successor to the Double-Groove style. Thus the likely dates of production for the Double-Groove wrenches are from the mid 1940s to around 1950, and we'll use 1944-1950 as the stated range in the following figures.
New Britain NDF-33 Open-End Wrench, Double-Groove Style
Fig. 53. New Britain NDF-33 1x1-1/8 Open-End Wrench, with Inset for Reverse Detail, ca. 1944-1950. Fig. 53 shows an example of the Double-Groove style, a New Britain NDF-33 1x1-1/8 open-end wrench, with the reverse marked "Forged" and "Made in U.S.A." in raised letters.
The overall length is 11.5 inches.
The pic from AA didn't show up when I copied the test. Pic's are of my wrench.
