A classic, in three distinct parts. The bottom half is military, the tripod is a Type G, used to mount the M1915 Battery Commander's Telescope or the M1 Aiming Circle. The M1915 is actually an odd looking binocular that looks like rabbit ears and the M1 is a crude sort of surveying instrument used to orient field artillery batteries. On top of the tripod is the base of an M1915, but from there up is a post-GI construction having little relation to the bottom. Jaegers used to sell this and other hybrids from the 1950s until the 1980s, they would have castings made to adapt surplus stuff to civilian use, and use surplus optics to make instruments to go on the tripods. The telescope here is an example of this sort of thing. The military would have no use for this as it sits, their approach to optics is wide field of view with good light grasp, something a long refractor like this didn't have. Military optics slower than F/5 are uncommon. As for surveying, anyone that has done any surveying would recognize this as impractical for that purpose. It's a Jaegers (or someone like them) hybrid using surplus parts.
Edited by Spectral Joe, 01 August 2021 - 01:39 PM.