Description
Technical Manual (TM 9-1240-292-35P) for M115/T146 Panoramic Telescope October 1962
U.S. Army Technical Manual TM 9-1240-292-35P for M115/T146 Panoramic Telescope, October 1962
Item Overview
This U.S. Army technical manual is the field-and-depot maintenance repair-parts and special-tools list for the M115 Panoramic Telescope, formerly designated T146. Issued as TM 9-1240-292-35P in October 1962, it was prepared for military maintenance and supply personnel supporting this precision artillery sight.
This listing is for the technical manual only. It does not include an M115 telescope, telescope mount, artillery weapon, tools, or other fire-control equipment.
About the M115/T146 Panoramic Telescope
The M115 was a fixed-focus panoramic telescope used to aim heavy artillery during indirect fire. It was installed with the M137 Telescope Mount, which supported the telescope and provided elevation and cross-level adjustments.
The telescope used an azimuth counter instead of exposed azimuth scales. This counter recorded movement in quarter-mil units. The M115 provided 4-power magnification, a 10-degree field of view, and a full 6,400-mil azimuth range.
Its reticle could be viewed through a red illumination window or with a separate reticle lamp. The extended eyepiece helped the gunner use the telescope without interference from the counter assembly.
Historical Background
TM 9-1240-292-35P was published as the M107 and M110 heavy self-propelled artillery systems were entering U.S. service. These tracked weapons gave artillery units greater mobility than older towed designs.
The M107 provided long-range fire with its 175-mm gun. The M110 carried an 8-inch howitzer for powerful high-angle fire. The M115 helped their crews establish direction for indirect fire, while related elbow telescopes supported direct-fire aiming.
Both artillery systems later served during the Vietnam War. A later M115 parts-manual edition appeared in 1970, showing continued Army maintenance and supply support for the telescope.
Publication Details
- Manual number: TM 9-1240-292-35P
- Publication date: October 1962
- Subject: M115/T146 Panoramic Telescope
- Manual type: Field and depot maintenance repair parts and special tools list
- Item included: Technical manual only
Collector and Research Value
This manual is a specialized addition to a U.S. Army technical-publication, military-optics, or artillery collection. It also provides period reference material for museums, restorers, and historians studying Cold War fire-control equipment and early M107 or M110 development.
Ideal For
- U.S. Army technical-manual collections
- M115 Panoramic Telescope research
- M107 and M110 artillery displays
- Military optics and fire-control collections
- Vietnam War and Cold War exhibits
- Museum and restoration reference libraries
Approx length 8", Approx width 10", Approx height .15", Approx weight .2lbs.
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