Omega has gone back and forth over the years on having parts available separately. Many years ago you could get aluminum inserts apparently, but for the last 10 years at least, you have had to buy the whole bezel. When the ceramics came along, initially some you could buy the insert for, as well as the lume pip (properly called a capsule). But recently (back in September of this year) Omega has gone back to every bezel only being sold as an assembly, with no inserts or capsules available.
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