Detailed overview of TR and TR-1 periscopes, that were accepted to service in 1930’s
TR-1 periscopes are hermetically sealed. Have no dioptrical settings. Magnification – 4x. Rarest type of soviet trench periscope. There is unconfirmed information, that it was copied from japanese trench periscope.Currently 1938-1942 produced examples are known to me.
TR and TR-1 periscopes
TR-1 periscope in use (click to enlarge)
Most well known and common type is TR periscope. Usually it is called TR-4 periscope, but correct name is TR. 4x is size of magnification. Production period – end of 30′ and untill end of 40’s. Earliest observed example is 1938 dated, latest – 1948. All periscopes have rangefinding reticles.
Rangefinding reticle measurments
They were produced by 2 factories
First manufacturer is plant NKV № 355 \ Zagorsk optical-mechanical factory
Periscopes produced by this factory are observed with 1938-1948 dates (currently unconfirmed information about production in 1937), but production was continued after 1948, those periscopes do not have dates.
Not dated examples (post 1948)
Early periscopes (1938-1940) are different in construction from later examples. Eyepiece block in them can be rotated (close – З mark at the tube\open – O mark at the tube), when it closed objective is closed by metal plate. They also have rubber eyepiece, and another construction of the top part.
Early periscope at the right. Note З (closed) mark
Closed and open position
Difference in the top part between early (3 right periscopes) and late examples
Early periscopes in use (click to enlarge)
Late eyepiece block
Late periscopes in use (click to enlarge)
Second manufacturer is plant NKVD № 3 \Plant NKAP № 296 (1940-1941) Kharkov\ Plant NKAP № 296 (1942) Berdsk
Production period – 1940-1942. Periscopes produced by this fatory can be marked with 1940, 1941, 1942 dates (pictures below), or not dated (picture above).
1940 periscopes were early construction, with rotating tube, construction was identical to periscopes mabufactured by ZOMZ. 1941-1942 periscopes (late construction), produced by this factory have some difference from ZOMZ periscopes. Late type have rounded top end, and another knurl at the eyepice ring. Periscopes, produced by this factory, are much less common,
Refurbed TR periscopes
Almost all periscopes, that are available at the marked, passed through postwar Soviet refurb programm. Tubes were repainted, damaged parts were replaced. In most cases such periscopes have refrub marks, in some rare cases they do not have them. We can observe periscopes that do not have no logos of 2 factories that produse them. Those periscopes were heavily refurbed at arsenals, and those are arsenal logos.
Some periscopes that were used for training purposes, were marked with УЧ letters (from russian – Учебный), and painted with black paint
Origanlly untill 1944 and post 1946 periscopes were painted to light green color. It is similar to color in which periscopes were repainted during postwar refurb.
Original paint color
Original paint color in 1944-1946
Prewar and wartime cases were hard shell, postwar- softshell from canvas
Soft shell cases appeared in late war period (usually were replaced during refurb)
There is a number posts at forums about beginning of production of new model, TR-8 in 1945. This is is not correct. Only few examples were produced for tests, and they looked another way than serial examples
There is a number of periscopes with 1945, or even 1941 stamp at the tube, but this is not a production year