I Can’t Mod This Watch! - Seiko SNZH55 "55 Fathoms"

Seiko SNZH55

Modding watches is a thing… a big thing. In fact it has been explained as one of the driving forces behind design decisions by some of our biggest watch manufacturers as they examine what enthusiasts do to their products. However I recently purchased a watch specifically for modding and changed my mind. It was just too good to play around with.

The watch in question was a Seiko SNZH55K1, often nick-named the “55 Fathoms”. It is a very popular model for modding because there are just so many interchangeable parts available (think SKX which it shares the 7S26 movement with). The submariner style dive watch design lends itself to changing bezels, bezel inserts, dials, crystals, hands, straps, and even movements if you wish to go for the later 4R36 hackable and hand winding version. And it is very well priced – this one landed brand new, with tags and a box for less than A$500

But when I un-packed the “55 Fathoms” I realized that it was a very attractive watch in its own right. That unique glossy black “hardlex” bezel insert, the classy black/silver colour co-ordination, and the overall vintage vibe, spoke volumes to me. It is a really nice looking watch and I decided to keep it original. Well, except for a strap change. The original stainless steel band is not bad but it is heavier than I like and a black sailcloth version is on order. In the meantime it sports a croc grain leather strap.

Here are some photos to help explain why I decided to keep the SNZH55K1’s original appearance. On the left is the Tudor Black Bay dive watch, highly respected, homaged by a number of brands, and selling for around US$3500. On the right is the venerable Blancpain 50 Fathoms – a well respected timepiece credited with being the first modern diver’s watch and often homaged by those who mod the SNZH55 even to the extent of including a 55 Fathoms dial inscription. The Blancpain sells for around US$10,000.

Seiko 55 Fathoms


In the middle is the SNZH55. Whilst it is no Blancpain or Tudor, its appearance sits well above its price range, and it doesn’t need to make any apologies. Apart from a strap change I will be happy to leave this watch as it is, and enjoy it as a quality dive style watch with its own unique features. 

PS: Sailcloth style strap has arrived - see photos below.

Seiko 55 Fathoms

Seiko SNZH55

Seiko SNZH55


Seiko SNZH55

Seiko SNKH55 "55 Fathoms" Sailcloth Strap
SNZH55 with Sailcloth Style Strap


Seiko SNZH55 "55 Fathoms"


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