G'c
·Also just saw another post from TZ-UK forums (Jack Norman), which i find very helpful (also addresses the 550 movement point):
https://forum.tz-uk.com/showthread....mega-Seamaster-300-including-Military-watches
To quote the 1st post there: "...The Omega cal.550 movement with 17 jewels created in 1960 was chosen specifically for the American market, as watches that exceeded 17 jewels were subject to more tax in the US. The compromise was made in the automatic assembly, where brass bushes were used instead of jewels. The brass bushes were prone to wear, and it is not uncommon to see cal.550 movements that have had both the upper and lower automatic bridges changed to the jewelled version." I guess the highlighted sentence may also be a cost factor (servicing) when considering the price.
Hopefully other people interested in the 165.024 can find this useful too.
https://forum.tz-uk.com/showthread....mega-Seamaster-300-including-Military-watches
To quote the 1st post there: "...The Omega cal.550 movement with 17 jewels created in 1960 was chosen specifically for the American market, as watches that exceeded 17 jewels were subject to more tax in the US. The compromise was made in the automatic assembly, where brass bushes were used instead of jewels. The brass bushes were prone to wear, and it is not uncommon to see cal.550 movements that have had both the upper and lower automatic bridges changed to the jewelled version." I guess the highlighted sentence may also be a cost factor (servicing) when considering the price.
Hopefully other people interested in the 165.024 can find this useful too.