In 1862, what brand of monkey wrench is the guy holding in the Wheelwright photo?
Wrench with the threaded shaft adjustment is a Taft's pattern Railroad Wrench which was a refinement of Merrick's 1851 patent made by Bemis & Call. Around 1862 L. & A. G Coes (later A. G. Coes Co.) took over production from Taft. They made these into the early 1870's. So if the picture was taken in 1862 wrench could of been made by Taft or if was fairly new by Coes
(http://i222.photobucket.com/albums/dd3/buswrench/message-board/wrench.jpg)