This is a mid-war Rangefinder Infantry, No. 2. (MK III) production No. 3737, and of course shows signs of use, likely in Flanders. Engineering and physics professors Barr (Leeds) and Stroud (Glasgow) founded an optics manufacturing company in Glasgow, Scotland, in 1895, and the decades of wars made it so lucrative that the two doctors were full time businessmen at the outbreak of World War I. The rangefinder has a 4 inch diameter scope, but the apparatus measures 35 1/2 x 7. Weighs around 20 lbs. Anniesland, Glasgow, Scotland, 1916.