Description
Technical Manual (TM 9-1240-274-34) for M117/T177 Panoramic Telescope January 1963 FSN 1240-864-2930
This Technical Manual TM 9-1240-274-34 covers field maintenance for the M117/T177 Panoramic Telescope, FSN 1240-864-2930, and is dated January 1963.
The M117 was an artillery fire-control optic used with the M145/T208 Telescope Mount. Together, the telescope and mount supported indirect-fire laying of the M108 105 mm and M109 155 mm self-propelled howitzers.
Historical Significance
The M117 panoramic telescope formed part of the sighting equipment developed for a new generation of self-propelled artillery. When installed on the M145 mount, it allowed the gunner to measure azimuth and lay the M108 or M109 for indirect fire.
TM 9-1240-274-34 documents Army field-maintenance support for this optical instrument during the early service period of those howitzer systems. It preserves component-level information beyond the operating guidance found in broader vehicle manuals.
What This Manual Covers
TM 9-1240-274-34 is the Army field-maintenance publication for the M117/T177 Panoramic Telescope. Its scope concerns support-level maintenance of the optical instrument rather than operation of the complete M108 or M109 vehicle.
The manual provides a dedicated technical reference for maintaining the telescope within its artillery fire-control role. Parts-oriented support was issued separately under TM 9-1240-274-35P.
Key Features
- Publication: TM 9-1240-274-34
- Equipment: M117/T177 Panoramic Telescope
- Federal Stock Number: 1240-864-2930
- Publication date: January 1963
- Maintenance scope: Field maintenance
- Associated mount: M145/T208 Telescope Mount
- Documented platform context: M108 105mm and M109 155mm self-propelled howitzers
- Issuing authority: Department of the Army
Why This Manual Matters
The M117 was a specialized optical instrument within a larger artillery fire-control system. A dedicated maintenance manual gives researchers more focused information than a general howitzer publication can provide.
This manual is useful for studying M108 and M109 sighting equipment, indirect-fire optical systems, and the Army's maintenance approach to panoramic telescopes during the 1960s.
About This Manual
This Department of the Army publication is TM 9-1240-274-34, dated January 1963. It concerns field maintenance of the M117/T177 Panoramic Telescope under FSN 1240-864-2930, later formatted as NSN 1240-00-864-2930.
The publication covers the telescope itself and is distinct from the separate manuals for the M145/T208 mount and the complete M108 or M109 self-propelled howitzer.
Ideal For
This manual is a strong fit for:
- Military technical-manual collectors
- M108 and M109 restoration researchers
- Self-propelled artillery historians
- Fire-control and optical-system specialists
- Museum and technical-reference libraries
Approx length 8", Approx width 10", Approx height .2", Approx weight .3lbs.
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