To avoid any further confusion I have to confess that my previous statement was not meant serious - should have been a joke...
I was pretty confident that it was understood this way as nobody questioned my assessment.
Sorry, I did not want to mislead anybody.
To stay clear: I have never seen such a crown on any Omega before - I think the OP´s father may have mixed something up when he stated it had always been on his watch - memory can play strange sometimes...
IMHO the solution
@Vitezi has offered (see above) is the most likely explanation - might indeed have belonged to a Pagol watch.
I hope you will still believe my assessments concerning 30 mm Omegas in the future despite of my "bad attempt"
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