US Navy Diving
School, class of
Omega Seamaster 300
Case Diameter: 41.5 mm
Case Height: 13 mm
Case length: 48 mm
Lug Width: 20 mm
Movement: Omega cal. 552 24j
non-hacking automatic. 19,800 bph, 50
hour power reserve
Case material: Stainless steel
Crown: Omega Naiad non-screw down.
Bezel: Bi-directional, indexed w/ 60 clicks
Water resistance: 300 meters
This watch has Omega's Naiad crown
system which is a non-screw down, self
sealing crown which increases pressure
on the seal as water pressure increases
at greater depths.
Seamaster 300s were issued to British
Royal Navy divers from the mid '60s to
early '70s. This is a un-issued civilian
version of the same watch. This watch was
restored by Jack Aleyxon at IWW.