Whatever happened, we all understand that the watch is rare and quite the treasure. Now, where do you find a case back?
Found this one for sale on the internet...
"Blancpain Fifty Fathoms Aqualung Vintage Gilt Fifty Fathoms Aqualung Rotomatic MILITARY + EARLY SN
$29,900.00
Blancpain Vintage Fifty Fathoms Gilt Aqualung MILITARY Rotomatic Incabloc, this is the first series Blancpain Aqualung from the 1950s and is one of the most important and first dive watches in history, stainless steel case is in very good condition, automatic signed AS 1361 N movement with Blancpain 50 Fathoms signed rotor, 17 Jewels, original and unaltered radium dial is in excellent condition for its age, the radium on the dial and hands are original to the watch, early Blancpain Rotomatic Incabloc had the signature in Gilt printing, original bakelite bezel is nicely aged with unique inverted 30, military markers can be seen on the underside of the bezel as well as on the case where the bezel sits (numbers typically are not supposed to match), original dust cover, 3 color gasket, very early SN (52X) dating to circa 1956, size: 41mm, thickness: 13.8mm, Extremely rare watch and an early example of a Blancpain Fifty Fathoms Aqualung Rotomatic with military history. Please note the serial number 52X is one of the earliest examples known. Email us about this watch Trade for this watch
$29,900 Case Diameter [mm] : 41.0 Case material : Steel Condition : Used Gender : Unisex Location : Boston, MA, United States Movement : Automatic Selfwinding Reference number : 27418 Thickness [mm] : 13.8 "
Source :
https://www.hushhush.com/watches/bl...fathoms-aqualung-rotomatic-military-early-sn/