So I am looking to purchase my first significant Swiss mechanical watch and after months of going back and forth on different brands and models I have finally settled on the Omega Speedmaster 3520.50 or the 3220.50. I am hoping to get more information on these two specific models and I was hoping you guys could help me. What exactly is the difference between the two models? so far I know the 3520.50 is a 39mm while the 3220.50 is a 40mm, the 35 has a black arm on the date hand while the 32 is white, and they have different clasps for the bracelet. what other differences are there? does anyone know the date range of production for both of these models? is there a resource out there that I should know about to find these answers myself?

Bonus: What do you guys think of these models?

 

The 3520.50 was produced from 1995-2001 and water resistant to 30 M. It has a snap-on back. As you know it is 1 mm smaller than the 3220.50. The 3220.50 was produced up to 2014. It is water resistant to 100 M and has a screw on back. I considered both watches but went with the 3220.50. The 3220.50 is C.O.S.C. the older model is not. The bracelet is upgraded on the 3220.50 as well. The newer model is much better and is only $200.00 more at the most.