Tweaks to ETA Movement?

[ericf4]

Can anyone comment on how Bremont works over ETA movements for the Supermarine 500 i own? Im curious what tweaks are made to that movement, apart from being COSC of course

[Vig2000]

Good question; I'd like to know myself. Well, they're high quality ETA movement since they're COSC certified. I know they use an engraved rotor as well. Beyond that, I don't what other modifications, if any, Bremont makes to their movements.

[Antoniopd]

There's an interesting discussion here: http://forum.atgvintagewatches.com/s...heir-movements

[MarkH]

ETA chronometer grade movements are usually fitted with an upgraded balance wheel and regulating assembly, Anachron balance spring rather than Nivarox, a higher grade pallet fork and higher grade pallet fork stones, and movement decoration. Not sure if Sellita perform the same upgrades but I'd imagine they are similar.