Google books shows a few tiny hints, not much
Seem to exist 1881 - 1919.
Incorporated 1913,
... incorporated with a capital stock of $10,000, by Edwin C. Fisher, Amasa C. Gould and Isaac V. Brock. (Mill Supplies, Vol III)
Listed in the Mechanics Exhibition in 1881
They are among the Corporations sanctioned and dissolved by the MA legislature in 1919 for not paying corp licence fees, since they do not show up after that, they had probably failed by then.
Early, listed on Charlestown street, later on state st.
They printed a catalog, 1881: "Boston Combination, Cylinder & Nut Wrench ..."
(4 pgs,Not avl online)
Listed in brands index's as "Boston"
Assigned Patent 1250534, by F.E.Walden of Worcester - for a bottle cap (how odd)
1884 Sci Am is the only photo ad I could find, sorry, fuzzy
Datamp shows more interesting patent(s):
http://www.datamp.org/patents/advance.php?pn=832575&id=13855&set=2PS: The other patent in datamp is by Stillson....Interesting connection
(The one in the picture below, not the quick adjust)