28800 A/h vintage automatic movements

In work…

28800

1968(1969) – OMEGA 1000, 42h, hack feature
1968(1969)-1973, 370000 (1000-1002)
from 1972, cal 1010… (not same stem!)

1969 – ETA 2724, 42h
1969-1972, < 50000 (ETA 2722, 2724, 2728)
first ETA calibre with 28800 A/h
Stem W3390

1969 – AS 2162, 46h, hack feature
1969-1978 (2162, 2163, 2166,  2176…)

1970 CERTINA 25-67, 42 h, 27 jewels
1970-1972
from 1972-1977, caliber 25-68
from 1976-… , caliber 919, 920 – 45h

1971 – ETA 2774 (2771/ 2774/ 2780/ 2784/ 2790/ 2790-1/ 2791) 45h, hack feature
1971-1980, >25000000 (all automatics of the family, and 21600 A/h)
Stem W3275

1971 – ETA 2824 (flat, without -1,-2), 40h, hack feature
1971-1979, 1618952 ….
(2824, 2826-2, 2828, 2830 (not 2930!) Triovis regulator, 2834, 2836)
Stem W3408
https://www.watch-wiki.net/index.php?title=ETA_calibres
1979 – ETA 2824-1 !
1982 – ETA 2824-2
Stem is not same!

1971 – LONGINES 633.1 (mod. 2824) (633.1, 633.2), 40h, hack feature
from 1972 – 6641, 6642, 6651, 6652 from cal. 431, 40h
from 1975 – 890, 36h, hack feature

1972 – ZENITH 2562PC  – 44h
1972-1975, 65000
from 1975-1978, 2572PC

? – 2870, 2872, 2878, 44h, opt. hack feature
1975-1983 ETA 2890-2892, 42h, hack feature

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36000 (ETA)

1969 – ETA 2734 (2724 family), 42h
1969-1972, < 50000 (ETA 2732, 2734, 2738)
first ETA calibre with 36000 A/h
option: excenter regulator
option: Triovis micrometer regulator
Stem W3390 (AS ETA 2724)

1971 – ETA 2826 (2824 family), 40h, hack feature
1971-1977, just few thousands
ETA (2826, 2832, 2837, 2838)
Stem W3408

2832 – Zenith!

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