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CHRONOGRAPH 1 MK.2 - Limited Production



Details & Specifications



The Mk.2 chronograph case attempts to overcome significant engineering challenges Hajime Asaoka faced in the construction of the Chronograph 1 - which leveraged the Seiko NE86 that was by itself a thick movement at 7.65mm - and takes in stride collector requests for a thinner case. With the new Mk.2 case, Hajime Asaoka overcame the limitations by incorporating a design technique from the 1930s - to make the thickness of the movement imperceptible on the exterior. The Mk.2 is now a three-part case that has a much thinner visual profile, but is also built more robustly and allows for better repairability. In terms of comfort, the lugs shape and position have been newly adjusted to ensure the same comfortable fit as before.

This piece presents in like new in box condition with full box and papers 


Type Automatic winding Chronograph
Calibre NE86
Power Reserve (h) 45 h
No. of Jewels 34 jewels
Frequency 4 Hz (28,800 vph)
Case Material 316L Stainless Steel 

Case Diameter

Case Thickness

38 mm

11.7mm (13.5mm incl sapphire)

Water Resistance 30 m / 100 ft
Bezel Stainless Steel 
Crystal Sapphire box crystal
Dial The dial itself is called a cylinder dial, which is gently curved from the center to the outer edge.
Dial Indicators
Strap Material Black calf leather 
Clasp Pin-Buckle
Clasp Material Stainless Steel

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