Hi Nicolas,
Welcome to the vinatge Omega world and as usual you've made a grand entry with some lovely watches. I particularly like this new Seamaster - a watch which I have perhaps not properly appreciated before.
I have two Speedmasters - a 105.012-66 and a 145.022-69 and love them both. I'd really like an earlier one but will have to be patient. Following the theme of Omega manual wind tool watches (well, sort of tool watches) I have recently added two 1945 British military 'WWW' watches (ref CK 2444), one with original dial and one with the numbered MoD replacement dial. They are lovely little things with a really nice 30T2 movement.
I do like vintage Omega's from this period and hope I'll acquire more.
I've rambled on a bit - the main message is that I really hope you enjoy yours too.
Best,
Vernon.