I'm pretty fond of a beaten up, but original cal 321 Speedmaster. Favourite reference has to be the earlier 105.012. Sure a common choice, but what a watch!
Kudos on this one - a case reference 2648 in stainless steel is rare and I don't use that term lightly! The only one I've ever seen and this one is in tip top shape.
My two little cousins with a very close friend(a bit OT the friend, but the cousins seemed to be happy together, so...)