Impressive pix, cosmik. The fonts and teeth height differ on the sockets indicating different manufacturers or different time/machinery at same mfr.
Do you happen to know whether the sockets interchange with the Facom 67 series?
Thanks. I have added those to the list at F1 just for completeness and explained it in the Groups F-G Notes in post #1.Though I don't believe they're a pass-through, is there any word on the sockets interchangeable with the 11mm "1/4" drive Snap-on low-clearance RAT72?
Thank you so much again cosmik. I now have the Facom and SAM models in a separate group. I can't in good conscience put them in the same group as Armstrong/Matco as Neophyte indicated unless I get a sample to check with.i think either Facom or SAM is the socket manufacturer since there always were close ties between the two and only the ratchets were made in-house by both...
yes, same specs and the same PTT contracts were awarded/split to both manufacturers so interchangeability for those tools was a contractual obligation.![]()


Are the armstrong sockets interchangeable with the matco ones ?
You're welcome. Please keep in mind I listed by brand because a brand is not always the name of its owner and many companies simply have have their brand on what another company actually manufactured.... So I guess that pretty much sums it up. And thank OP for such a well constructed thread that outlines the particulars of the various manufacturers offerings. But had no idea there were that many sets on the market.