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Lugworthy
39 mm · 47.3 mm lug-to-lug
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Airain Watches

TYPE 21

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

≈ $4,002In stock

Approximate. Charged in EUR (€3,450).

Last checked Oct 26, 2026

View on Airain Watches’s site ↗

From Airain Watches

The Airain Type 21 is inspired by a 1960s vintage model first found at a Sotheby’s auction, which honored the French Ministry of Defence’s 1956 request to upgrade the Type 20 for increased durability and easier maintenance. Both the Type 21 and its predecessor feature a hand-wound column wheel chronograph with a flyback function and countdown bezel. The Type 21 sports a glossy black dial with Grade X1 ‘Old Radium’ lume, proudly showcasing the Airain crown logo and ‘Type 21’ marking. Its slightly larger stainless steel case retains the classic charm while meeting modern standards. Powered by the caliber AM2 from Manufacture AMT in La Chaux-de-Fonds, Switzerland, the Type 21 Re-Edition embodies timeless sophistication and functionality. THE STORY The Airain Type 21 stands as a tribute to a 1960s vintage model unearthed at a Sotheby’s auction in 2021. Rooted in the original 1950s designs, both the Type 21 and its sibling, the Type 20, faithfully embody the era’s aesthetics and functionalities. They feature a hand-wound column wheel chronograph with a flyback function and a countdown bezel. Interestingly, the Type 21 emerged from a French Ministry of Defence request in 1956, seeking an upgraded version of the Type 20 with enhanced durability and reduced maintenance requirements. Displaying a sleek black dial with Grade X1 ‘Old Radium’ lume, the Type 21 proudly bears the Airain crown logo and the distinct ‘Type 21’ marking. Notably, its bezel boasts a luminous triangle at the 12 o’clock mark. While the stainless steel case measures 39.0mm (bezel 39.5mm) — slightly larger than the original — it maintains the classic allure while meeting contemporary standards. The Type 21 Re-Edition is powered by the caliber AM2, meticulously crafted by Manufacture AMT, Sellita’s high-end division in La Chaux-de-Fonds, Switzerland. TECHNICAL DATA Model: Type 21 Reference: 423.438 Case Material: Stainless steel Diameter: 39.5mm (bezel), 39.0mm (case) Height: 10.85mm Crystal: 3.92mm domed sapphire with anti-reflective coating inside Lug-to-lug: 47.7mm Caseback: Screwed in, engraved Bezel: Bi-directional rotating friction bezel with black lacquered filled numbers and triangle at 12 o’clock filled with ‘Old Radium’ Grade X1 Swiss Super-LumiNova Water resistance: 50m (5ATM) Movement Caliber: Manual-wind column wheel chronograph caliber AM2 with flyback complication Power reserve: 63 hours (+/- 2 hours) Chronograph: 30 minutes Jewels: 23 jewels Shock protection: Incabloc Adjusted in 5 positions Strap Strap: Genuine Leather Strap in Brown with beige stitching and double buckle, engraved with Airain logo Lug Width: 20mm

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
39 mm
Lug-to-lug
47.3 mm
Thickness
10.5 mm
Thickness incl. crystal
Not listed
Lug width
20 mm
Material
316L steel

Movement

Type
Not listed
Caliber
Not listed
Power reserve
63 h
Functions
Not listed

Crystal and bezel

Crystal
Sapphire
Bezel
Not listed

Water resistance

Rated to
50 m

Dial and lume

Dial
Not listed
Lume
Not listed

Strap

Strap
leather
Every spec Airain Watches lists
Size
18mm
Bezel
smooth bezel
Model
Type 21
Strap
Genuine Leather Strap in Brown with beige stitching and double buckle, engraved with Airain logo
Height
10,5mm
Jewels
23 jewels
Caliber
Manual-wind column wheel chronograph caliber AM2 with flyback complication
Crystal
3.92mm domed sapphire with anti-reflective coating inside
Caseback
Screwed in, engraved
Diameter
39mm
Material
Stainless steel
Lug Width
20mm
Lug width
20mm
Reference
423.438
Lug-to-lug
47,35mm
Buckle type
double buckle and normal pin buckle
Chronograph
30 minutes
Power reserve
63 hours (+/- 2 hours)
Shock protection
Incabloc
Water resistance
50m (5ATM)

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