Experience the history behind the Italian Navy's Decima Flottiglia MAS who pioneered Naval Special Warfare during World War Two. The 45mm MKII series dive watch pays homage to the Italian Naval Commandos of the 1950s.  The crown protector was an innovation that increased water resistance during dive missions. The Italian Navy (Marina Militare) Special Warefare teams required a way for crowns to stay locked and prevent water from entering the case while performing missions.

The Fifty Five Fathoms is proud to introduce the Italian Navy MKII Diver with in a 45mm (316L) case size.  Powering the watch is a manual wind ST3600 movement with 3-Days of power reserve similar to the original. The dial has a painted Marina Militare marking signifying use with the Italian Navy.  The hands are matte black creating a more tactical aesthetic. As our watches are build to order, you will also be able to select rose gold hands (please send us a note when purchasing). 

This case is CNC milled out of a single block of 316L stainless steel to ensure its ruggedness and ability to perform under the harshest conditions. 

This version of Italian Navy MKII does not have a seconds hand at the 9 o'clock position.  We also carry a version with the seconds hand for a more tactical feel. 

MKII Model Enhancements:

Movement: Manual Wind ST3600 (Adjusted Movement by Fifty Five Fathoms)

Case: 45mm Brushed 316L Stainless Steel

Crystal: Scratch Resistant Sapphire Crystal 

Bezel: Brushed

Dial: 34.5mm Aluminum with Luminous hour markers 

Strap: 24mm 100% Genuine Leather

Water Resistance: 300m - Pressure Tested

Assembly: United States - West New York

Warranty: Fifty Five Fathoms 3-Year Limited Warranty 


All Fifty Five Fathoms watches comply with US Department of Defense PII and information transfer policy.


** We have been made aware that there are eBay Sellers using our pictures and descriptions and selling at a mark-up. We have reported this to eBay. Please note Fifty-Five Fathoms watches come with warranty cards, tags and field pouch.

eBay User mksimplesolutions has been using our product pictures without permission and claiming they are selling on behalf of our company.  We do not provide a warranty on any of their false products - many have reached out to us for warranty / repair work but apologies we are NOT affiliated with this bad actor**

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All of our watches will ship free to all US Domestic Locations.  International orders are subject to eBay's shipping Global Shipment Program Charges and we have NO ABILITITY to change eBay's shipping/tax charges.