ConElPueblo
·phillips auctions with extract of the archives , note different crown . note no swiss made on the dial
That one has a replacement crown, too, but a different one. The one in the OP is a typical replacement crown, available today. The correct type of crown is a bowlerhat style crown, as can be seen on the other examples provided by tdn-dk and others in this thread. It is common on fifties 30mm Omegas...
And that photo from Phillips is worthless, as "swiss made" would be obscured by the rim of the case, when taken from that angle. Notice how it has almost disappeared from tdn-dk's in his photo?