With this dial, this is probably the Fifty Fathoms which is the closest to the competitor of the era, the Rolex Submariner.
Compared to the other Fifty Fathoms, 3 / 6 / 9 / 12, Milspecs, Barakuda, No Rad or Assymetric cases, this is, in my opinion, the " quietest " dial.
Quiestest doesn't mean less interesting, at the contrary.
I am not able to say which one, between this RI and the 3 / 6 / 9 / 12, is the first born, by the way.
Anyway, this Rotomatic Incabloc is a true Beauty which deserved a fresh picture.
Here it is:
Which one is your favourite?
Best,
Nicolas