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This was the first Soviet TLR produced, starting in 1946. It was in fact the first known camera produced after WWII when the civilian production has resumed at LOMO factory in formerly sieged Leningrad.

Produced: 1946-1951
Name: „Комсомолец“
Producer: GOMZ
Frame size: 6x6 cm.
Lens: Triplet-21 6.3/80
Shutter ZT: 1/25, 1/50, 1/100 + B.

Quantity: 306.743 units.
(other resources refers to 25.000–28.000).

Classification of Komsomolets cameras
1st version
Type 1a. Frame counter, 6 screws on the side-plate, film window is left-sided. Leningrad markings. 1st type of shutter design.
Examples known: #472169 (sovietcams), #476444 (Fedka, film window is centered).

Type 1b. Identical to type 1a, but with 2nd type of shutter design.
Examples known: #479208 (Enn), #4713334 (Fedka).

2nd version
No frame counter anymore, 6 screws on the side-plate, film window is centered already. Leningrad markings. 2nd type of shutter design.
Examples known: #4724641 (sovietcams), #4744666 (Enn), #4747241 (Enn).

3rd version
Type 3a. 6 screws on the side-plate, Leningrad markings, 3rd type of shutter design. Has markings “Model A” on the top plate.
Examples known: 4845952 (Enn).

Type 3b. Identical to type 3a, but without "Model A" markings on the top plate.
Examples known: 4820938 (napchop) #4828613 (eBay 2008), #4876455 (Fedka), #48126660 (sovietcams), #48128228 (Fedka), #4867204 (David Tomlinson).

Type 3c. Identical to type 3b, but without 6 screws on the side-plate anymore.
Examples known: #48112211 (Enn), #4911579 (Fedka), #4954231 (Fedka).

4th version
3rd type of shutter design, but comes with new T-22 6.3/75 lens.
Examples known: #4958015 (sovietcams), #499994 (Alex-Store 2008).

5th version
Type 5a. 4th type of shutter design, T-22 6.3/75 lens, New shutter sequence added: B, 1/10s, 1/25s, 1/50s, 1/100s and 1/200s. Still Leningrad markings on the frontplate.
Examples known: #5008095 (Enn).

Type 5b. Camera identical to type 5a, but no more Leningrad markings on the fronplate.
Examples known: #5012564 (David Tomlinson), #5023658 (Fedka).

A complete Komsomolets type classification chart can be vewed Sovetcams.com