Omega 342

Omega'sfirstautomatic movement, producedfrom 1942 to 1949andfrom 1949with newcaliberdesignations.See alsoOmegacal: 330 -355.

The example movementwith serial number: 12 359 537,was madeaprox in: 1950.

Data: Omega cal: 342 (28.10 RA PC T1 AM 17p)

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  17 jewels, automatic wind, sub second.
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  S: = 28.10 mm.
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  H: = 4.80 mm.
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  N: = 19.800 A/h.
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  Power reserve: 42 h.

Versions untill 1949. Marked on the plate:

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  30.10 RA PC AM 17p: sub second, from -49 = cal: 330.
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  30.10 RA PC JUB AM 17p: sub second, chronometer, from -49 = cal: 331.
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  30.10 RA PC T1 AM 17p: sub second, from -49 = cal: 332
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  28.10 RA PC AM 17p: sub second, from -49 = cal: 340
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  28.10 RA PC JUB AM 17p: sub second, chronometer, from -49: cal: 341.
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  28.10 RA PC T1 AM 17p: sub second, from -49 = cal: 342
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  28.10 RA SC PC: center second, from -49, cal: 350
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  28.10 RA SC PC T1 AM 17p: center second, from -49, cal: 351

Versions: 30.10 mm. From 1949. Marked on the barrel bridge.

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  330: sub second.
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  331: sub second, chronometer.
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  332: sub second.
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  333: sub second, chronometer.

Versions: 28.10 mm. From 1949. Marked on the barrel bridge.

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  340: sub second.
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  341: sub second, jubilee chronometer (1947).
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  342: sub second, redesign of cal: 340 (1949).
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  343: sub second, chronometer, excenter regulator (1950).
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  344: sub second, chronometer, svan neck regulator (1953).
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  350: sweep second (1945).
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  351: sweep second, redesign of cal: 350 (1949).
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  352: sweep second, chronometer, excenter regulator (1950).
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  353: sweep second, date (1951).
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  354: sweep second, chronometer, swan neck regulator (1953).
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  355: sweep second, date, chronometer, swan neck regulator (1953).