Tudor Submariner Snowflake Blue dial Ref. 9411/0The Tudor Snowflake nickname refers to Submariner models with reference numbers 7021 0, 7016 0, 9411 0 & 9104 0. This distinctive nickname comes from the watchs signature design elements: square hour markers and the so called snowflake hands. These hands were introduced by Tudor to improve legibility in low light and underwater conditions. Like other Tudor and Rolex Submariners, the Snowflake has a rich history, including military service. Tudor