Omega 30, 15 jewels

One of the most successful movement series ever made, a perfect balance between reliability and precision. Caliber 30 was introduced in 1939 and was manufactured in different versions until late -60's. The cal 30 is quite rare to find even altough it was made in 36.000 pcs. The first cal 30's had a different plating on the plate and bridges (same as cal: 26.5) wich easy could be oxidated. The example movement has the later rhodium plating. In 1940 the 30 T1 was in production with minor changes to the plate and barrel bridge.

Pic: 2. Rose polished plate on the dial side.

Pic: 3. The wheel train have gold plated wheels and matte polished escape wheel.

Pic: 4. Detail, caliber number.

Pic: 5 & 6. Original balance from -39 with the last 3 digits from the movement number.

Pic. 7. Original dial and hands in the typical 1930's design with very large sub second dial.

Example movement, number: 8 971 433 - aprox: 1939

Technical data: Omega cal: 30

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  15/17 jewels, manual wind, sub second.
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  S: = 30.00 mm.
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  H: = 4.00 mm.
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  N: = 18.000 A/h.
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  Power reserve: 43 h.

Versions with sub second:

• 30: 15 jewels, bi-metallic compensation balance, no shock protection (1939).
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  30T1: 15 jewels, bi-metallic compensation balance, no shock protection (1940).
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  30T2: 15 jewels, bi-metallic compensation balance, no shock protection (1941).
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  30T2PC: 15 jewels, incabloc, monometallic balance (1941).
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  30T2RG: 17 jewels, chronometre, no shock protection (1943).
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  260: = 30T2PC from 1949, rose gold plated movement (1943).
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  261: 17 jewels, antimagnetic (1943).
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  262: = 30T2RG from 1949 (1943).
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  265: 15 jewels, antimagnetic (1949).
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  266: 17 jewels, antimagnetic (1950).
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  267: 17 jewels, antimagnetic, bewelled main plate (1957).
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  268: 17 jewels, antimagnetic, ring balance, Breguet hairspring (1960).
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  269: 17 jewels, antimagnetic, ring balance, flat hairspring (1963).

Versions with center second:

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  30SC: 16 jewels, bi-metallic comp. balance, no shock protection, c-sec (1940).
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  30SCT1: 16 jewels, bi-metallic comp. balance, no shock protection, c-sec (1941).
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  30SCT2: 16 jewels, bi-metallic comp. balance, no shock protection, c- sec (1941).
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  30SCT2PC: 17 jewels, incabloc, monometallic balance (1943).
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  30SCT2RG: 17 jewels, chronometre, no shock protection (1947).
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  280: = 30SCT2PC from 1949.
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  281: = 30SCT2RG from 1949.
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  283: 17 jewels, antimagnetic (1950).
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  284: 17 jewels, antimagnetic, bewelled main plate (1957).
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  285: 17 jewels, ring balance, Breguet hairspring (1960).
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  286: 17 jewels, ring balance, flat hairspring (1963).