Omega Speedmaster "Pre Moon" watch, ref. 145.022-68 ST
Case and bracelet in good condition, probably never been buffed and they don't present any important damage or issue. The case back has the original logo still clearly readable. 
The original stepped dial with applied rises logo is beautiful and very well preserved, with no damages or fading, the tritium plots has a lovely patina, the hands are also vintage but the tritium is darker has usual on this. 
Original crown and pushers, vintage crystal in good condition with light lines but the Omega logo is missing so could be a later replacement.
The original bezel has pitting and scratches as shown in photos.
The movement works properly and has a good timekeeping and amplitude. The chronograph start and reset properly. 
Serial number 26.xxx.xxx dating 1969 and sold in Switzerland (Omega Certificate is included).
No box, not guaranteed for timekeeping or waterproofs.