just wondering.... the other manufacturer... is it indestro?.... if so, duro and indestro were made by the same manufacturers.... if you look deeper, you will find wrenches, sockets and other drive tools being the same with only slight varations being the part numbers and names stamped into them... so, i would say no fake, it is either indestro or duro....
read the following... copy and pasted from alloy artifacts.... highlighting the duro connection...
Indestro Super 3202R 1/2-Drive Reversible Pressed-Flange Ratchet
In later years Duro added a reversing mechanism to the pressed-flange ratchets, and then offered them in both male and female drive. The next figure shows an example of a female drive reversible ratchet.
Fig. 147. Indestro Super 3202R 1/2-Drive Pressed-Flange Ratchet, with Insets for Side View and Reverse Detail, ca. 1945+. Fig. 147 at the left shows a 1/2-drive Indestro 3202R reversible female drive ratchet, marked "Pat. No. 1,902,878" under the shift lever, with "Indestro-Super" and the model number on the reverse.
The overall length is 9.4 inches, and the finish is chrome plating.
The ratchet mechanism uses an 18-tooth drive gear, slightly finer than the previous example but still relatively coarse.