Poljot Kirowa rough age determination based on years of manufacture

From Poljot we have so far been able to research any meaningful documents for age determination using the serial number

Here are the years of manufacture of the Poljot movements for a rough age determination "not older than ...":

1924 "Kirovskie Type 1" on purchased Dueber-Hampden machines from Ohio

from 1937 Cal 2602 (originally LIP movement, acquired by Kirowa in 1937)

from 1946 "Kirowa 1" former Tutima/Urofa 59 factory with original machines, war booty

from 1946 Cal 85 Marine Chronometer dismantled Lange&Söhne original machines / war booty

1961 Cal 2209

1962 Cal 2612.1 (copy/replica of the Anton Schild movement "AS 1930"

1950 - 1965 Cal 2409

from 1972 Cal 2609.H (redesign of the Cal 2609)

1972 Cal 2616.1H (automatic movement with 30 jewels)

1974 Cal 3133 (identical to the Valjoux 3133 after purchase of the original machines)

1983 Cal 2614.2H, nickname "made in Germany"

Source: uhrwerksarchiv.de