Chronosport UDT

Case Diameter: 42mm
Case Height:  12mm
Case length:  47mm
Lug Width: 20.5 mm
Movement: Miyota Y652 Quartz Analog w/
multi-function LCD
Case material: Matte black chromium
coated stainless steel (not PVD)
Crown: Screw down
Bezel: Uni-directional, indexed w/ 60 clicks
Crystal: Flat mineral glass
Water resistance: 20 ATM (666 ft)
Vintage: Late '70s
Issued to specialized US military units such as the Navy SEALs, UDTs (Underwater
Demolition Teams) and US Army Special Forces, the Chronosport UDT is considered
by many to be the ultimate military watch of it's time. It's rugged design, accurate quartz
movement  and pioneering use of a highly legible dial combining both analog and
digital displays made it a design sensation when it first appeared in the late 1970's.
This watch was also produced  by Breitling in the 1980s with the model name "Pluton",
and appeared in the Breitling catalog until 1999.
UDT
(Underwater Demolition Team)

U.S. Navy UDTs were the precursor to the
modern Navy SEAL teams. Created in
WWII, UDT missions involved recon,
demolition, minesweeping, and clearing
beaches of obstacles prior to amphibious
landings. UDTs were also tasked with
NASA spacecraft and crew recovery. In
1983 existing UDTs were re-designated
"SEAL Teams" by the U.S. Navy.