Sheldon Axle Co. Wilkes-Barre, PA
in P.T.Rathbone's book; " the history of old time Farm Implement Companies and the WRENCHES they issued."
there is listed more than 6 types.
78's were listed as being sold at auctions for prices ranging from $5.oo to $40.oo
* this book should be on everyones shelf/desk that has any interest in implement wrenches.