Original U.S. WWI X7.5 Model 1918 Trench Periscope by Wollensak Optical Co. With Leather Case Gahendra Martini Rifles & Parts and 4 Years:

and 4 Years:

temperature and range adjustments

It also made other products and tools

(SE or hkp)- Sachsische Emaillier u

The top of the visor has a lovely pattern of checking and crazing in the black enamel

Original U.S. WWI X7.5 Model 1918 Trench Periscope by Wollensak Optical Co. With Leather Case Gahendra Martini Rifles & Parts and 4 Years:Original item: Only One Available. Measuring 19 inches in length, this is a very nice WWI Era Model 1918 Battery Commanders periscope. In X 7. 5 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: TRENCH PERISCOPE NO. 10 X7. 5 MODEL 1918 M. F. G'D BY WOLLENSAK OPT. CO. ROCHESTER, N. Y. U. S. A. No. 4517 R. G. C.