Omega started producing calibre: 30T2 about 1939 and it lasted until 1962. The movement was updated during it’s production run spawning many different variants. The Omega calibre 30T2 took over the role of calibre 26.5. Several variants where made during it’s production run:
30 : 15 jewels, no shock protection
30T1: 15 jewels, no shock protection
30T2: 15 jewels, no shock protection
30t2 RG: 17 Jewels, excenter regulator
30T2PC: 15 jewels, Incabloc
260: =30T2 since 1949, 15 jewels
261: 17 jewels, antimagnetic
262: 17 jewels, excenter regulator
265: 15 jewels, antimagnetic
266,267: 17 jewels, antimagnetic
268: ring- instead screw balance
269: flat- instead Breguet-hairspring
sweep second:
30SC : 16 jewels, no shock protection
30T1: 16 jewels, no shock protection
30T2SC: 16 jwwels, no shock protection
30T2SCPC: 17/18 jewels, Incabloc
30T2SCRG: 17 jewels, exenter regulator
280: =Omega 30SC T2 since 1949, 17 jewels
281: 17 jewels, excenter regulator
283,284: 17 jewels, antimagnetic
285: ring- instead screw balance
286: flat- instead Breguet-hairspring
Omega Calibre: 30T2-268
- Made approximately: 1939-1968
- Made in Switzerland
- Power reserve 44h
- 15-18 Jewels
- 18000 B/A
- DM 30mm
- H 4.05mm 5.1mm
Surface finish on the 30T2 is usually Rhodium and from the 265 it is copper guilted. Bridge has clean design with beveled edges. Screws are polished and have a good finish. The bridges are rhodium plated.
Surface finish on top side of the plate and bridges: 8 Points
Surface finish on screws: 8 Points
Surface finish on crown and ratchet wheel: 6 Points (262 8Points)
Movement Jeweling: 6-7* points
Movement design innovation (for ca 1939): 6 points
The Omega base plate on the 30T2 is perlage while on the 265 onwarsd a starburst finish. Winding mechanisms are well made with high finish on screws. Gear train has a good finish. Setting the time and winding feels balanced.
Base plate finish: 7 Points
Setting and winding mechanism: 8 Points
Gear-train finish: 8 Points
Movement durability: 8 Points
Omega 30T2RG, 30T2SCRG, 262 and 281 have a much improved finish on crown wheel, ratchet wheel, gear train, click and a Exenter micro regulator +10 Points*
The first models are not shock protected, but later got Inca shock as standard and at one point their own shock protection.
Shock protection: 3*
Some models can be found with a swan neck regulator: 4*
Some models have boot regulator: 3*
All variants of the calibre: 30T2 have a Breguet hairsprings and in good condition will keep exellent time.
Accuracy: 8 points
Chronometer regulated: +2*
Power reserve of 44 hours is good.
Power reserve: 7 Points
Omega calibre: 30T2-286 points summary:
Surface finish on bridges and top side of base plate: 8
Surface finish top screws: 8
Surface finish on ratchet and ratchet wheel: 6
Movement Jeweling: 6-7*
Movement innovative design for ca 1939: 6
Total bonus points: 0-10*
Base plate finish: 7
Setting and winding mechanism: 8
Gear-train finish: 8
Movement durability: 8
Accuracy: 8-10*
Power reserve: 7
Grand total: 80-93*
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