The Omega calibre 8803 is a member of the Omega 8000 family of in-house automatic movements. It is Swiss made with 35 jewels. This movement features an anti-magnetic hairspring, Co-Axial escapement and twin barrels for extended power reserve.
Some of the topics covered in this caliber listing:
In Omega’s own words:
“Self-winding movement with Co-Axial escapement. Certified Master Chronometer, approved by METAS, resistant to magnetic fields reaching 15,000 gauss. Free sprung-balance with silicon balance spring, automatic winding in both directions. Small Seconds display at 6H. 18K Sedna™ gold rotor and balance bridge and luxury finish with Geneva waves in arabesque.” –source
Omega 8803 VS 8800:
Since the 8802 is based on the Omega caliber 8800, you might be wondering what the differences are between them. The main difference is that the 8800 has a central sweeping seconds hand and the 8802 has a small seconds subdial at 6:00.
Omega 8803 VS 8802:
There is a similar caliber 8802 with the difference being that the 8803 has an 18K gold rotor and balance bridge (this is what the Au 750 indicates on those components).
The Omega caliber 8803 is an in-house movement and not available for individual purchase, even for Swatch Group parts accounts. At the time of this post, the retail prices of Aqua Terra 150M Small Seconds 38mm watches this movement powers ranges from $27,600 to $43,100 USD.