Advice Request: Bezel insert for 1675 GMT (c.1961, gilt dial with PCG)

[CFR]

Hi All,

I am considering swapping bezel inserts but would like some expert opinions first.

Here's the watch it will go on -- ignore this bezel insert (which I believe is period-correct):



Can any of you experts tell me if the bezel insert on the watch below looks like it would be (a) authentic and (b) period-correct for the watch above? Here's that bezel insert (ignore the watch it's currently on):







Thanks for any help you can provide!