This watch was likely issued to a J37 Viggen pilot of the Swedish
Air Force. The J37 went into service as Sweden's front line
fighter/interceptor in 1971 and saw use until it's retirement in 2005.
Lemania "Flygvapnet"
SwAF Issue

Case Diameter: 42 mm
Case Height: 13 mm
Case length: 47.5 mm
Lug Width: 20 mm
Movement: Lemania  cal. 1872
manual wind chronograph, 17 jewel,
21,600 bph, 50  hour power reserve
Case material: Stainless steel
w/ screw down back
Crown: Non screw down
Bezel: Bi-directional, indexed
w/ 60 clicks
Water resistance: Not rated
Vintage: Early '70s

Engraved on the back are the
"Triple Crowns", the trademark of
the Swedish Military. This was a
Flygvapnet (Swedish Air Force)
issue pilot's chronograph.
Additional pictures here