Combination wrench identification help.

[59Sled]

Any idea of the maker of this wrench. Only markings on it besides the sizes on the ends is BM J-326.
First, is it even vintage. Maybe a contract wrench of some sort?
Thanks,

 

[Bob-B]

Not sure of the mfg, but those sizes match the sizes on a typical Bridgeport mill. 11/16 to nod the head, 3/4 for everything else. IIRC a wrench like that was supplied with each mill. Maybe BM stands for Bridgeport Machine?

 

[Leviton]

Not sure of the mfg, but those sizes match the sizes on a typical Bridgeport mill. 11/16 to nod the head, 3/4 for everything else. IIRC a wrench like that was supplied with each mill. Maybe BM stands for Bridgeport Machine?

Looks like Bob nailed it!

Here are excerpts from 1966 and 1973 Bridgeport manuals that mention a J-326 wrench. One of them cross-references a Billings #1166 wrench that is 11/16 & 3/4.

(I also saw the same wrench on ebay that was marked BMI instead of just BM.)

 

[59Sled]

.

Not sure of the mfg, but those sizes match the sizes on a typical Bridgeport mill. 11/16 to nod the head, 3/4 for everything else. IIRC a wrench like that was supplied with each mill. Maybe BM stands for Bridgeport Machine?

Looks like Bob nailed it!

Here are excerpts from 1966 and 1973 Bridgeport manuals that mention a J-326 wrench. One of them cross-references a Billings #1166 wrench that is 11/16 & 3/4.

(I also saw the same wrench on ebay that was marked BMI instead of just BM.)

Thank you both.
That makes total sense.
We have a lot of older Bridgeport Mills at my work. And this one was in a drawer with other tools they were looking to get rid of. This was the only one in the drawer that looked somewhat older.
Thanks again. This forum is the best.