Tudor Submarine 9401/0

[williamrex]

Hello,
I have just joined this Forum and I am very pleased with what I have already read. My question is I have a Tudor Submarine Black Face Black Bezel Model #9401/0 Ser # 846xxx. This watch was left laying around in a drawer for many years, fortunately it was wrapped in a velvet cloth. Yesterday I took it to the local watch smith for a exterior cleaning. I didn't want him to pop off the back cover as he was not a certified Rolex technician. He cleaned up the crystal and the bezel and the crown. The watch looks so much better.I have enclosed a picture of the exact same watch,when I become more skilled I will take pictures of my actual watch. On the crown is three little buttons under the Rolex Logo what is the meaning for that ?.On the bracelet is the # 380 ? with the Rolex submarine logo on the bracelet links. I would appreciate any information on this watch, and again I am pleased to be a member of this group. Thank you. PS is this a "Snowflake" type watch?