There were over 831,000 built. It is also accurate and gives plenty of power reserve. This manual wind calibre created in 1962 has 17 jewels. It has been adjusted to two positions. Calibre 601 has been based on the very successful calibre 550 series.
A great time piece that was made to last if maintained and looked after.
The watch may be over 50 years old (circa 1969 ) but it looks and runs well with just a careful winding up. The style is uncluttered ( as was the style back then ) and unlike many of todays high fashion watches, does not have, nor need, extra buttons or crowns or multi-dials. Just straightforward reliable timekeeping - and Omega and it's Swiss heritage does that.