On top of the symmetry it is a new movement which really interests me. I love the dual subdial complication despite the fact that Seiko were doing it in 1972 with their 7016 movement.
I do prefer it in the speedmaster, but thats just a personal bias.
Altogether a very nice watch as is/was the 3313. It seems a shame to sell it so quickly after purchase of the new one.
Enjoy it and i look forward to a 6th month review.
Best
G