I was lucky enough to find this pipe wrench in an old box of tools in a s/h shop while on holidays in Tasmania. The markings on it are " MATHIESON GLASGOW No.1 1/4-1". While looking at the wrenches on offer in the Spring Wrenching News Auction, Item 171 looks to be a very similar wrench, Patented on June 15, 1875 to a Charles Fenton of New York,NY. US Pat No. 164,368. On the DATAMP site for this patent number it notes that a known example of this wrench is marked "T. CHATWIN PATENT". The hunt continues to try and find additional information on this wrench.