Description
U.S. Army Technical Manual Change 1 TM 9-1240-313-35P for M32, M32C, and M35 Tank Periscopes, May 1966
This U.S. Army publication is Change 1 to repair-parts and special-tools manual TM 9-1240-313-35P for the M32, M32C, and M35 Tank Periscopes. Issued in May 1966, it updates the original parts manual dated June 23, 1964. This listing is for the Change 1 update only. It does not include the complete original manual, a periscope, optical assembly, periscope mount, weapon, or tank.
Purpose of Change 1
Army change publications were issued to replace, correct, or add selected pages in an existing technical manual. Change 1 expanded the manual’s listed coverage from the M32 to the M32, M32C, and M35 periscopes. It was intended to be filed with the original June 1964 manual and does not serve as a complete repair-parts publication by itself.
About the M32 and M32C Tank Periscopes
The M32 and M32C were gunner’s fire-control periscopes used for observation and direct-fire aiming. Their major sections included a head assembly, daylight body assembly, and infrared body assembly. The optical system provided a unity-power view for wide, close-range observation and an 8-power view for sighting distant targets. The active-infrared system supported night operations when used with compatible infrared lighting equipment.
About the M35 Tank Periscope
The M35 was another gunner’s periscope used in the M60-series tank fire-control system. It could be installed in place of the M32 using the M118 Periscope Mount and also supported active-infrared viewing. When paired with the M14 Reticle Image Projector, the M35 placed aiming information inside the gunner’s optical view, connecting the sight more closely with the tank’s fire-control equipment.
Vehicle Application
The M32 periscope family is documented with M60 and M60A1 tanks and infrared-equipped M48-series tanks, including the M48A3. The M35 is specifically associated with the M60-series fire-control system and its 105mm main gun. Vehicle configurations and federal stock numbers changed during later upgrades, so this listing does not claim that every tank used all three models or the exact early FSNs printed for this update.
Historical Background
Change 1 was published during the Cold War as the U.S. Army expanded the use of improved day and night fire-control equipment. Active-infrared systems used an infrared searchlight and compatible sighting equipment to help tank crews operate after dark. Adding the M32C and M35 to the parts manual reflected the continued development of the M60-series fire-control system. Later publications covered updated M32E1, M32CE1, and M35E1 configurations with improved optical and night-vision features.
Publication Details
This change publication is identified by the following military manual and federal stock information:
- Manual number: TM 9-1240-313-35P
- Change number: Change 1
- Change publication date: May 1966
- Original manual date: June 23, 1964
- Subjects: M32, M32C, and M35 Tank Periscopes
- Manual type: Field-and-depot maintenance repair-parts and special-tools list
- M32 Federal Stock Number: 1240-980-9288
- M32C Federal Stock Number: 1240-792-9068
- M35 Federal Stock Number: 1240-967-3353
- Related maintenance manual: TM 9-1240-313-34
- Item included: Change 1 update only
Collector and Research Value
This Change 1 publication is a specialized reference for military-optics collectors, tank restorers, museums, and historians. It documents the addition of the M32C and M35 to the Army’s M32 repair-parts manual and helps record the development of Cold War tank fire-control equipment.
Ideal For
This original military change publication is well suited for the following collections and research projects:
- U.S. Army technical-manual collections
- M32, M32C, and M35 parts identification
- M60 and M60A1 restoration research
- M48-series tank research
- Cold War military-optics displays
- Armored-vehicle fire-control collections
- Museum and archival collections
Approx length 8", Approx width 10", Approx height .15", Approx weight .2lbs.
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