I recently purchased a a few fire-control instruments online, and I want to see if anyone can give me some information about them.
First is an M4 mortar sight Ser #88xxx. From other posts on this board, I believe that falls in the range of wartime production. My question regards the case. At first look it resembled the cold-war era diecast aluminum "M81" type case, but on closer examination this one looks like sheet metal. It also has leather straps, instead of nylon web. Most pictures of wartime M4 sighs I've seen show leather cases. Did some wartime sights come with sheet metal cases?
Second is an M12A7 panoramic telescope Ser #53xxx. I have found some information on this 'scope. TM 9-1240-236-35P shows that the M12A7 was a cold-war instrument, used with several different artillery pieces, depending on the reticle used. This one has the C reticle, for the M114 (the re-badged 155mm howitzer M1). The manual also shows the same sight used with the launcher for the Honest John nuclear rocket. My question is, what is the difference between the M12A7 and the wartime versions of the M12?
TM 9-748, page 402, shows an M12 as used for indirect fire on the M36 tank destroyer. What other uses did the M12 find?
Also, what color were wartime panoramic telescopes? This one is painted OD, with black scales and controls.