For the most part U-boat watches are above what most of us feel is affordable. You may want to post your question in the Public forum. I wish I could help, did you contact U-boat and what they had to say? Good luck with your watch...they look awesome!!
A forum community dedicated to watch owners and enthusiasts. Come join the discussion about watch collections, displays, watch winders, accessories, classifieds, and more! We welcome all manufacturers including Casio G-Shock, OMEGA, Rolex, Breitling, Rolex and Tudor, Seiko, Grand Seiko and others.