Odd little monkey wrench

[cliffitz]

Would anyone recognize this double jaw monkey wrench? No makers mark or any markings that I can see.

 

[Private Lugnutz]

Nice find.

Baxter patent 84,605 (1868)
These Double Open End wrenches were made and sold initially by the inventor out of Newark, NJ, and then Tower & Lyon, Greene, Tweed & Co, E. C. Stearns, and many others as the rights were licensed out. It is an ingenious design. The wrench is made of two halves, mortised, and joined together by a left- and right-hand screw-rod. The halves do not move independently of each other, they move synchronously in opposite directions like machinists’ parallels.

 

[four.cycle]

pretty nice copy there.

they remained a pretty popular item for a few decades at least:

 

[d42jeep]

Mine is unmarked as well.
-Don