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37.5 mm · 48.2 mm lug-to-lug
Photos appear once Airain Watches approves image use

Airain Watches

SOUS-MARINE ‘TROPICAL’

Lugs stay on wrists from about 6.5 in (lug-to-lug rule of thumb)

≈ $2,378In stock

Approximate. Charged in EUR (€2,050).

Last checked Oct 26, 2026

View on Airain Watches’s site ↗

From Airain Watches

Airain Sous-Marine Tropical Limited Edition Swiss Made modern reissue of Airain’s 1960s dive watch which includes a unique and historically accurate ‘Parmentier crown’ providing water-resistance of 200 meters, a unidirectional rotating diver’s bezel with 120 clicks and 60 minute scale. The Airain Sous-Marine Tropical Limited Edition is part of the Sous-Marine Limited Series and based on the Airain Sous-Marine Re-Edition. Developed through our collaboration initiative called CoLAB, together with our community of fans and watch enthusiasts throughout the world. Deliveries The Sous-Marine production has been completed. Deliveries starting 27 May 2024. Airain Sous-Marine Tropical Limited Edition Swiss Made modern reissue of Airain’s 1960s dive watch which includes a unique and historically accurate ‘Parmentier crown’ providing water-resistance of 200 meters, a unidirectional rotating diver’s bezel with 120 clicks and 60 minute scale. The Airain Sous-Marine Tropical Limited Edition is part of the Sous-Marine Limited Series and based on the Airain Sous-Marine Re-Edition. It features a tropical dial with light old radium lume and bronze colored hands on a Tropical Black FKM Rubber strap and a Fixoflex bracelet. It was developed through our collaboration initiative called CoLAB, together with our community of fans and watch enthusiasts throughout the world. Case 316L stainless steel case Diameter: 37.5 mm (case) / 38.2 mm (bezel) Height: 10.45 mm Crystal: 2.92mm domed sapphire with anti-reflective coating inside Lug-to-lug: 48.2mm Stainless steel case back, screwed down, engraved Bezel: unidirectional (counterclockwise) rotating with white engraving and Super Luminova dot at 12 o’clock, full black PVD coated Water resistance: 200m (20ATM) Functions Hours, minutes, seconds, date Strap Lug width: 20mm Strap: quick-release Tropic-style FKM rubber strap Buckle type: pin buckle Size: 18mm Bracelet Fixoflex® expandable watch band Stainless steel Finishing: Matt brushed Width: 20mm Easily removable links Movement AM5 automatic calibre Diameter: 25.6mm Height: 4.45mm Frequency: 4 Hz / 28,800 vibrations/hour Twenty-four (24) jewels 68 hours power reserve Hacking seconds Tungsten rotor Finishing: Geneva stripes (Côtes de Genève), blue polished screws and gold coloured engravings Datewheel: roulette (alternating red and black numerals) Adjusted to 4 positions (CH, 3H, 6H, 9H) Warranty 2 years international warranty

Specifications

Details and photos come from Airain Watches’s website, last checked Oct 26, 2026. Specs were read automatically and may contain mistakes.

Case

Diameter
37.5 mm
Lug-to-lug
48.2 mm
Thickness
Not listed
Thickness incl. crystal
Not listed
Lug width
20 mm
Material
Not listed

Movement

Type
Automatic
Caliber
Not listed
Power reserve
Not listed
Functions
Not listed

Crystal and bezel

Crystal
Sapphire
Bezel
Not listed

Water resistance

Rated to
200 m

Dial and lume

Dial
Not listed
Lume
Not listed

Strap

Strap
fkm
Every spec Airain Watches lists
Size
18mm
Bezel
unidirectional (counterclockwise) rotating with white engraving and Super Luminova dot at 12 o’clock, full black PVD coated
Strap
quick-release Tropic-style FKM rubber strap
Width
20mm
Height
10.45 mm
Crystal
2.92mm domed sapphire with anti-reflective coating inside
Diameter
37.5 mm (case) / 38.2 mm (bezel)
Datewheel
roulette (alternating red and black numerals)
Finishing
Matt brushed
Frequency
4 Hz / 28,800 vibrations/hour
Lug width
20mm
Lug-to-lug
48.2mm
Buckle type
pin buckle
Water resistance
200m (20ATM)

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Airain Watches SOUS-MARINE ‘TROPICAL’ · Lugworthy