Description
Technical Manual Change 2 (TM 9-1240-260-35P) for M31/T50 Tank Periscope July 1965 FSN 1240-676-2174
This Technical Manual Change 2 for TM 9-1240-260-35P updates the field and depot maintenance repair-parts and special-tools publication for the M31/T50 Tank Periscope, FSN 1240-676-2174, and is dated July 1965.
The physical publication is the Change 2 notice only. It applies to the original TM 9-1240-260-35P dated July 21, 1960, and is not the complete base manual.
Historical Significance
The M31 was a gunner's periscope used in U.S. tank fire-control systems during the early Cold War. It combined an 8-power aiming system with a reticle for laying the main armament and a unity-power system for observation.
Official change notices kept Army technical publications aligned with later support information. This July 1965 notice records the second formal update to a parts manual first issued in 1960.
Change 2 and the July 1960 Base Manual
Change 2 is tied directly to TM 9-1240-260-35P dated July 21, 1960. It was issued to revise that field and depot repair-parts and special-tools publication rather than replace it with a complete new manual.
Collectors and researchers should treat this notice as a companion document to the base manual. It preserves the publication history of the M31/T50 periscope's parts support during its service life.
What This Manual Covers
The underlying TM 9-1240-260-35P is the field and depot maintenance repair-parts and special-tools reference for the M31/T50 tank periscope. Change 2 supplies the revisions issued for that publication in July 1965.
This notice concerns parts-manual support for the periscope. It is not an operator's guide, a step-by-step maintenance manual, or a stand-alone replacement for the full July 1960 publication.
Key Features
- Publication: Technical Manual Change 2 for TM 9-1240-260-35P
- Change date: July 1965
- Base manual date: July 21, 1960
- Equipment: M31/T50 tank periscope
- Federal Stock Number: FSN 1240-676-2174
- Manual scope: Field and depot maintenance repair parts and special tools
- Physical publication: Change 2 notice, not the complete base manual
Why This Manual Matters
Change notices are part of a manual's official publication record. When retained with the base manual, they show how technical and supply references were updated after their first issue.
This Change 2 notice is useful for building a more complete TM 9-1240-260-35P reference set and for studying parts support for the M31/T50 tank periscope.
About This Manual
This is Change 2 to Department of the Army Technical Manual TM 9-1240-260-35P, dated July 1965, for the M31/T50 Tank Periscope, FSN 1240-676-2174. The original base manual was issued on July 21, 1960.
The offered item is the official Change 2 update notice and does not constitute the complete base manual.
Ideal For
This technical manual change notice is a strong fit for:
- U.S. military technical-manual collectors
- Owners of the July 21, 1960 TM 9-1240-260-35P base manual
- M31/T50 periscope parts researchers
- Tank fire-control and optical-instrument historians
- Museum and Cold War armored-vehicle reference collections
Approx length 8", Approx width 10", Approx height .1", Approx weight .1lbs.
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