U-Boat – U-42 Automatic (Ref. 6157 and 6471) and U-42 Chrono (Ref. 6475 and 6472) Limited Editions

This limited edition U-42 line offers two automatic and two automatic chronograph models.These astonishing and exceptionally rare models were designed with a reinvented hand winder made from the same Grade-5 Titanium that was used for the back case, case and bezel.

All engravings on each timepiece are carried out by mechanical pantograph, including the brass dial with plate located, which is galvanised and finished with a bright enamel paste. The pressure resistance of each timepiece is tested in an autoclave at 40 bar before the final assembly is completed.

The U-42’s winding crown was built in two parts: one is attached to the movement stem whilst the other is hinged to it with a pivot. This gives a flexible joint configuration which allows the crown to protrude considerably from the watch itself for winding and setting, yet returning it to a protected, hidden position, diminishing the side clutter when in action. This type of crown is imperative under certain conditions as it is absolutely necessary for activities during which gloves are required such as underwater operations and environmental practice at Arctic temperatures. The water-tight crown protection attached to the stem is assured by a clipping gasket in energised Polytetrafluoroethylene and by an o-ring twin-arrangement.

The U-42 Automatic models displays hours, minutes and small seconds whereas the U-42 Chrono in addition to basic timekeeping functions also boasts central chronograph 60 seconds, counter for 30 min at 6’o clock and 12 hour counter at 12’o clock. Small seconds counter is positioned at 3’o clock and date window at 9 o’clock.

Technical details
U-42 Automatic Chronograph, ø 53 mm – ref. 6475
U-42 Automatic Chronograph, ø 47 mm – ref. 6472
U-42 Automatic, ø 47 mm – ref. 6471
U-42 Automatic, ø 53 mm – ref. 6157
Limited Edition 999 Units

Movement
For ref. 6157 and 6471 automatic mechanical, personalized to U-Boat specifications for stem to be positioned at 9 o’clock. Power reserve: 40 hours.
For ref. 6475 and 6472 automatic mechanical chronograph modified and personalized at U-Boat specifications for date display and stem position at 9 o’clock. Power reserve: 48 hours.

Functions
Ref. 6157 and 6471: hours, minutes, small seconds
Ref. 6475 and 6472: hours, minutes, small second, chronograph 60 s, counter 30 min and 12 h. Date window at 9 o’clock.

Case
In titanium
Diameter: 47 mm or 53 mm
Charge axis, stop crown lever, stop glass handles, bezel runners, and strap pivots in steel AISI 316
Watertight on axis reset and assured charge by PTFE gasket
Bi-directional rotating bezel, in titanium, lockable with a lever on the right side of the case
Fixing of revolving bezel by 3 screws encapsulated in the back case
The bezel removal, for maintenance and washing obtained by removing the three screws, does not affect the watch watertight
12 o’clock ball indicator on the bezel made of ceramic
Caseback in titanium fixed on case with 6 encapsulated hexagon screws in steel.
Crystal: sapphire glass.
Water resistance: 300 meters, 30 ATM

Dial
Matte black, markers treated with superluminova (peach color)
Baton hands, treated with superluminova

Strap
Handmade and hand finished calf leather, carefully selected and  processed following the traditional artisan handcrafted techniques used  in the 1800’s, which give the strap a naturally distressed feel and look
Tongue buckle in titanium

Leave a Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.