A 1950s steel Lemania Royal Australian Navy (RAN) Single Button Chronograph. Featuring an original dial with military symbol "↑".

Its 38.5mm case is unpolished and its case backis  engraved with H.S.9 for “Hydrographic Services” as well as the R.A.N. stock number.

Manual wind Calibre 2210. Fitted with a NATO style nylon strap.