ATWG
·That’s a shame. Even if I don’t agree with you, I’d be interested to hear your more experienced (than me) view.
The new 16750 bezel is blue backed and came from a reputable Swiss parts dealer. I think it’s right on my watch, but I admit that how nice it looks may prejudice me.
As you well know, your insert above is a genuine Rolex FF factory replacement blue back. These have popped up in recent years and are commanding a premium in the market place ($1K vs. $250.) I have seen original FF BB inserts that are slightly different than yours, which are thought to be orig. to the watch. They can be distinguished by looking at the '8', where yours is round vs. flatter on the other (see stock pic below.) These make it even harder to differentiate them from red backs. Additionally, there are thin font red backs that resemble BB's. It's really tricky and I certainly can't tell them apart even after years of handling and research.
That's my 2 cents.
Best,
-A