Hi
jyyanks!

I have my 1981 BBK in at the spa in London at the moment, and the craftsperson recommended that I replace the turnlock because it's a bit wiggly. The emailed quote I got indicated that Spa would replace the turnlock and the plates on the straps for around 200 GBP. I emailed back, expressing concern that perhaps the new hardware wouldn't match the rings that secure the handles to the body of the bag, since those weren't on the list for replacement. I received a polite but somewhat indignant reply saying that Hermes would
never suggest or agree to a repair if they felt that the result would be "unaesthetic." Well! That's good. But I suppose we all have to decide whether our personal aesthetic standards might be even more rigid than Hermes'.

Is Spa saying they'll replace the plates on your bag or really JUST the turnlock? I think that might influence my own choice.
I decided to go ahead with the switch, for what it's worth-- if I had my druthers, my vintage bag would keep all of its vintage hardware forever, but honestly, I use that bag so heavily that it deserves a new turnlock that will keep it in working order for the foreseeable future, and because all the plates are being replaced as well, I don't think the contrast with the handle-rings will be too glaring. And the feet I could care less about.
Good luck with the decision!