Watch brand collaboration: 47Ronin x Eza Watch (Germany)

47Ronin Watch Straps
Eza Watches is a brand from a small watchmaking town called Pforzheim in Germany. Pforzheim has been called the “entrance to the black forest” due to its location in south-west Germany. The town is mostly known by its historical jewelry and watchmaking industry, which goes back more than 250 years.
47Ronin Watch Straps
The brand has a long history since 1921. With 37 years of absence in between, the brand was restarted in 2016 from the desire to make vintage looking watches in a modern way. Nowadays the brand is being managed by a young watchmaker and entrepreneur, Adriaan Trampe (26). He has a big passion for craftsmanship and especially watchmaking. To put this passion to use, he started a watchmaking education in a small close to his birthplace Rotterdam, called Schoonhoven.
47Ronin Watch Straps
We have been having nice chats with Adriaan over Instagram about his brand, watches and ideas for collaboration. After a couple of months, due to logistic delay over the peak of the pandemic, we finally received a SEALANDER BRONZE GREEN. 
This is the newest Eza Sealander. As the vision of Eza Watches implies, the Sealander is a 300-meter dive watch with an automatic Swiss ETA 2824 Calibre movement inside.
47Ronin Watch Straps
About the watch strap design
First of all, the  SEALANDER BRONZE GREEN is a solid dive watch. Although the 41.0mm case is not considered huge, it has some thickness at 14.2mm. Also, it certainly has some weight it in when carrying it on your wrist.
Hence, we have selected this Mocha brown "Crazy horse" calf leather which gives some thickness (4.75mm) and lots of strength to put up the watch on the wrist. 
47Ronin Watch Straps

Crazy horse leather which also can be referred as saddle leather is made by applying a special kind of wax to a full grain leather surface that has been smoothed out. The wax enhances the leather fibre and that way when they are scratched or rubbed, the leather's natural colour changes its shade that gives the antique, vintage appearance. 
Crazy horse leather are durable, strong, and of course its gives a unique look and feel which combines luxury and antique touch. With the wax applied to the leather, it protects the leather with water resistant and makes it more durable.

47Ronin Watch Straps

A piece of Kimono fabric from Kyoto Japan is placed beneath the first layer of the leather as an inlay. This piece of Kimono fabric is chosen for the large area of  brilliant gold colour it offers which matches the bronze case of the watch. 

Since only a small piece of the fabric is applied to the strap, it could be any part of the fabric at random. Hence, the resulting piece of fabric always come as a surprise, as each part of the Kimono fabric offers a unique pattern. 

47Ronin Watch Straps
On the leather, three diamond shaped cutouts arranged in a straight line are made to expose the Kimono fabric inlay beneath it. The cutouts are inspired by Samurai's Katana sword, where the handle has similar shapes and design. 
47Ronin Watch Straps
In order to complement the green bezel and the dial of the watch, a 0.8mm seaweed green thread is used for stitching the edges. The saddle stitching method is done by hand, such that in case any part of the stitching breaks, the rest of the stitching stays in place. 
47Ronin Watch Straps
A layer of dark green edge paint is applied to the edge of the strap to prevent water entering the leather, as well as to add another subtle complement to the over green theme of the watch. 
47Ronin Watch Straps
Finally, a golden stainless steel butterfly clasp buckle 22mm is installed to go along with the bronze shine of the case. Butterfly clasp buckle would reduce the bending of the watch strap every time it is being put on and taken down from the wrist. Since Crazy Horse leather can be stiff and strong, the butterfly clasp buckle will retain the shape of the strap, and also prolong its lifespan. 
47Ronin Watch Straps

The Material:

  • Mocha brown Crazy Horse leather
  • Kimono textile fabric from Kyoto
  • Seaweed green stitching (hand stitched)
  • Dark green edge paint (heat treated)
  • Golden stainless steel butterfly clasp buckle 22mm
  • Quick release spring bar

47Ronin Watch Straps


  • Length: 125/75 (can be customised according to wrist size)
  • Lug: 22mm
  • Buckle: 22mm
  • Thickness: 4.75mm


Order this watch strap at:

47Ronin#279 Mocha brown calf leather (22mm, Dark green stitching)

* Contact us for customised lug width, length, and thickness (Whatsapp +65 86567631,

47Ronin Watch Straps
Swiss Calibre ETA 2824 Automatic, Ligne 11-1/2’”, 25 jewels, 28.800bph, 38-40 hour power reserve, adjusted by Eza Watches to six positions.
Automatic & manual winding, Display by means of hands: hour, minute, second. Date calendar, Stop second device, Shock-absorber for balance staff.
CUAI9 bronze case with mixed brushed and high gloss finish. Case diameter 41.0mm, lug width 22.0mm, case thickness 14.2mm (including the double domed glass), lug to lug 49 mm.
High gloss 316L Stainless Steel Caseback with engraved logo.
Dial with high gloss indexes filled with C3 SuperLuminova™.
Ceramic bezel insert with C3 SuperLuminova™ at 12 o’clock.
Double domed anti-reflective, scratch resistant sapphire crystal.
Water resistance
Water resistant to 30 ATM, 300 meters.
Vintage leather and nato strap.
Adjusted to six positions and tested.
47Ronin Watch Straps

47Ronin 浪人 Watch Straps are designed & handcrafted piece by piece with exotic materials from various part of Japan, such as leather, Kimono fabric, Japanese print, and interesting materials.

Interested in our watch straps? 

Feel free to contact us for any enquiry at: 

Show us some love on Instagram @47ronin_watchstraps 

Visit our website for more information and regular updates on new releases

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