The original Tudor Submariner Snowflake was introduced in the late 1960’s as the 7016 and 7021 (date and non-date) in both blue and black. These models were made until the mid 1970’s and were replaced by the 9401/0 and 9411/0 models, which were essentially the same except for a change to updated ETA movements.
The model you see here is a 94110, which dates from 1979. It features a blue dial and bezel, the famous Snowflake hour hand, and is apparently the last year for square hour markers https://www.captainthewatch.is.
A 25-jewel, hacking, quickset date ETA 2784 automatic movement sits inside. Adjustment, by the way, is managed via a Rolex trip-lock crown. The caseback, by the way, states that Rolex Geneva makes the case. The 94-series Tudors, incidentally, are notable for better quality dials versus their predecessors, which tended to “rot”.
