Portsea Calendar Black
Portsea Calendar Black
Portsea Calendar Black


Portsea Calendar Black


Next release July 22nd

Regular price $875 AUD

$675 AUD

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The next release of the Portsea Calendar Classic is scheduled for 22nd July.

Pre-order yours now and save $200AUD on retail pricing.


Deck watches were popular among navy and merchant sailors in the early 20th century, particularly in WW1.

They were originally made as pocket watches with hand-wound mechanical movements and were the successor to the original 'marine chronometer' style sea-clocks of the 18th century, which mariners used to calculate longitude by means of celestial navigation. 

Triple Calendar

The Portsea is powered by the Miyota Calibre 9122 'triple calendar' self-winding mechanical movement with day, date and month complications.

The Cal. 9122 also features a 40 hour power reserve and a higher 28,800bph beat rate for a smoother sweep of the second hand.

Multi-Layered Construction

The multi-layered dial features a unique moulded ceramic main disc which gives the Portsea a sense of depth and detail, capped off by classic blued hands with our signature "M" counter-balance. 

The Portsea is completed by surgical grade 316L stainless steel casing, an anti-reflective sapphire crystal lens and robust leather straps.



  • Case Material 316L Stainless Steel
  • Case Diameter 40mm
  • Case Thickness 13mm
  • Movement Miyota Cal. 9122 Triple Calendar Automatic
  • Crystal Flat Anti-Reflective Sapphire
  • Dial Black Ceramic
  • Hands Silver
  • Strap 20mm 
  • Water Resistance 100m/10ATM


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