A Geo.Blake Back saw ; quite a petite thing of 18 tpi and with a 17thou plate. Iron back is 13mm wide so not a heavy saw. BSSM has George Blake Netherthorpe Sheffield 1816-1820.
Hey Charlie. A wonderful thing with such an unusual stamping. Have to love the tooth line but I am sure with the options you have it will never be forced to cut wood again. A deserved retirement after some 200 years. Enjoy Joe S.