Original U.S. WWI X6 Model 1918 Battery Commanders Periscope by Wollensak Optical Co. With Case British Field Gear The assembly has matching numbers:

The assembly has matching numbers: 71

Between these are oak leaves

The scabbard and blade bear matching serial numbers 7752

in this case marked TRUITT BROS & CO

except for spring

Original U.S. WWI X6 Model 1918 Battery Commanders Periscope by Wollensak Optical Co. With Case British Field Gear The assembly has matching numbers:Original item: Only One Available. Measuring 27 3 4 inches in length, this is a very nice WWI Era Model 1918 Battery Commanders periscope. In X 6 power, these were used to help view and plot artillery attacks from behind cover, to avoid exposing the commander to danger. The bottom of the periscope still has the manufacturers markings: BATTERY COMMANDERS PERISCOPEX6MODEL 1918M. F. G'D BYWOLLENSAK OPT. CO. ROCHESTER, N. Y. U. S. A. No. 2210R. G. C.