Help Identifying and Valuing Vintage Omega Pocket Watch Movement, Dial, and Plexi Crystal

Hello Omega enthusiasts,


I recently came across this vintage Omega pocket watch, but the gold case was unfortunately scrapped for its gold value (14K, weighed 28g, sold for about 6440 PLN). What’s left is the movement, dial, and plexi crystal. The movement is working but shows some spots of corrosion.


From what I’ve gathered so far:


• Serial number: 633676 (suggesting production around 1920-1925)


• Approximate caliber: Possibly Cal. 18’’’ or similar (manual wind, sub-seconds at 6 o’clock, about 38mm diameter)


• Dial: Gold-toned with Arabic numerals, showing signs of age and wear


• Crystal: Plexi (acrylic), original but scratched


I’ve attached photos of the movement (front and back), dial, and the original watch for reference. Could anyone help with a more precise identification of the caliber and model? Also, any rough valuation for these parts (movement + dial + crystal) in their current condition would be greatly appreciated—considering it’s for parts or restoration.


Thanks in advance for your expertise!


Best regards,

There are plenty of low grade 7 jewel Omega PW's about for not much money, whereas your is 17 jewels and more desirable because of it.
Find a cheap complete 7 jewel one and swap out the movement for yours.
Either Sterling ( preferable ) or Nickel.