The best movement for this is the gen movement made by IWC. You can get one from concepta or maybe Texski.
I have never heard anybody fitted a Swiss with the additional gears for the dreaded "seconds at six" mod. I don't see what that'd be good for as it would still be an accident waiting to happen.
Val.
Oh, and one more thing, seeing that you joined just two hours ago: Do a bit of reading around on this forum before ordering. There's great variety in the rep world and many many options. But there are also things you would like to omit, especially misunderstandings with a trusted dealer.
I suggest you do some research before deciding on a dealer and a watch.
Val.
Hi
You have several options:
Precious Time is UK based so shipping stays within EU; no customs trouble. He's very reliable but takes some time for delivery
Toro Bravo is in Spain, had very good service from him.
Narikaa also shippes from UK, old time member, never read anything bad. Had one very good experience with him.
Both Trusty and Josh (Jos Nana) have a EU forwarding service which costs a bit more but will prevent customs trouble.
All these dealers are found under the Trusted Dealers on this board. There you'll also find the links to their websites.
Have fun!
Val.