UBB.threads Forums General Militaria Flags, Field Gear, and Miscellaneous Militaria and Regalia Forum Waffenampt carbide lamp,railroad?signals?

Picked up this brass lamp with wood and metal handle has slide up panels ,sliding cover over round hole and slot ,for signaling?Dated 1935 and early waffenampt also F.F.A. Schulze.Berlin marked and DRP and a number,ex. shape looks complete.Anyone know what these were used for and do they have much value?First one I have ever seen,any help appreciated