Dr No[Moderator Omega - Wristscan]
34800
Fortunately movement parts for Ω cal 302 are still widely available . . .
Jun 18, 2022,18:34 PM
. . . so should there be current need for servicing, a watchmaker wouldn't have an issue sourcing replacements.
My ref 3697, which is fitted with the movement that was a precursor to yours, didn't run properly after it was serviced. Another watchmaker diagnosed the problem as a worn balance staff.
After fitting a new staff (look above the penny!) . . .
. . . the R17.8 movement . . .
. . . finally ran acceptably well.
Art