Vintage Omega Bullseye Swiss watch, Ref. 2383-6, Cal. 30T2 Original Radium Dial from 1947This is a 1947 Omega reference 2383 6 a well known and highly collectible reference from Omega's post war production, powered by the Caliber 30T2 PC. Serial number 11052047 confirms the 1947 date. The case is stainless steel, 35mm, with the straight angular lugs characteristic of the period. The dial is the standout here. It's the classic two tone bullseye layout: black outer chapter ring with Arabic numerals, lighter grey centre, sub seconds at 6.