Frazer & Jones

 

  I thought this was just another wrench from a long-gone 19th century agricultural equipment manufacturer, it's good to see that Frazer & Nash is still around casting iron in Syracuse, New York.

 From their site, the company was established in 1845 as Frazer & Benedict, became the Frazer & Jones Company in 1882 and was acquired by the current parent company, The Eastern Company in 1945.  Their business is medium to high volume castings less than 25 lb. No hulls for Sherman tanks or steam locomotive tender frames

I expect this wrench probably dates to their early days.