Congrats on the new acquisition!
Rolex' 31xx movement range is renown for how quiet they are. My Oyster Perpetual 36mm runs on the same 3130 movement as your Sub No date. I've never once either heard it, or felt it. It's so smooth! In stark contrast, the rotor on my Omega caliber 8806 Seamaster 60h anniversary edition makes an absolute racket, that I sometimes hear even when my wrist is a yard away from my ears
There's some good literature online around how starting with the 32xx generation of movements, the new ball bearings Rolex began using now contribute to a pronounced rotor sound, and on some models, a vibration that can be felt through the caseback. The trade-off for this noise is increased increased durability.
However, my personal preference is that the enjoyment I get from a silent rotor in the years/decades of wearing the watch, far exceeds the value I place in knowing I have a more durable rotor construction that unfortunately deprives my enjoyment of the watch every time I hear it... After all, you would only realize the benefit of the increased durability in repairs maybe once in 10-15 years worth of time, whilst a consistently silent rotor is something you can enjoy every minute you wear the watch.
it's for this very reason I decided to purchase a Submariner this year, before Rolex adopts the next generation movements into the Submariner range. Some speculate that the inevitable rollout of the 3235 movement into the Submariner line, is that it will begin with precious metal or two-tone Submariners a year or 2 before stainless steel subs, and I wanted to make get my hands on a new 116613 LB with this legacy 3135 movement before they're no longer available.
Enjoy your 'silent hunter' Submariner! Like the Speedmaster, it is a timeless classic tool that can now be appreciated as modern work of art!
