Case Katana PVD Black matte


Availability : In stock

By a modder, for modders

Diameter : 40 mm
Glass: Flat sapphire, Anti-reflective coating
Case : Stainless steel 316L
Caseback : Diver solid, Saphir, Slim solid
Thickness : 11,2 mm
Lug to lug : 47 mm
Crown: 316L Stainless Steel, Screwed
Lug Width : 20 mm

Flat sapphire (pre-installed), Anti-reflective coating
Glass seal
Seal of the Caseback
Crown with BBmod logo
Crown stem (Compatible Seiko 4R36, 4R35, NH36, NH35, 6R35...)
Pair of stainless steel spring bars
BBmod micro-fiber cloth

10 bar / 100 meters with Caseback slim
20 bar / 200 meters with Caseback Diver

Caseback type SKX007
Straps for NMK935 (Seikonaut) type case
Universal straps 20mm
Movements type seiko 4R36, 4R35, NH36, NH35, 6R35...
Dial 28,5mm

DHL Express (2-7 days)
Duties / Taxes + Customs clearance fees collected upon delivery for non-EU countries


The Katana case is the very first case entirely imagined and created by BBmod, it has everything Billy appreciates in a watch, from elegance to robustness.  

Physical Vapor Deposition

316L stainless steel case with matte black PVD treatment

The French workshop

From Imagination to

BBmod France specializes in the modification and complete customization of watches. Together, let's satisfy your desires and create a watch that suits you.

Detail of a seiko MOD designed exclusively by BBMOD

What they say//

Mr Mifsud
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Awesome! The watch is a gem - had very quick response from Billy and swift delivery! Very well mod'd and it looks fab. Now my wife wants one as well...
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Absolutely top! Flawless service from ordering to unboxing. The watches are very tasteful and carefully built. Pure joy, fast delivery, polite and fast response and the product is wow.

Unique nearly in todays world. Bravo!
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Great service, fast communication and delivery!
I got the watch in Sweden 1 day after it was sent from France. This is without a doubt the best service and communication I have ever experienced from a company abroad. I will order again 100%. Thank you so much, the watch is awesome.
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Billy helped me build my dream watch and the final result is better than I could hope for. Easy communication through the whole prosess and he was able to do changes to the watch when I changed my mind. Highly recommend his services and I'll order more watches from him in the future for sure.
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Fantastic service. Easy payment.
Very fast to answer.
Quick delivery. One day from France to Denmark.
A beautiful watch, perfectly finished in a nice case.


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