SUBDELTA is founded from a passion of designing and building exceptional tool watches that are very authentic, durable and of outstanding quality

Our mission to build the best, toughest and highest quality tool watches in the world

It all started with the P1lot One. This stunning grade 5 titanium "lefty" pilot's watch with a manual-wound ETA / Unitas 6498-1 was made exclusively by and for members of, the largest Dutch watch forum.

Subdelta Watches Pilot watch P1lot One

Subdelta Periscope, a one-hand 24-hour automatic piece, forged from bead-blasted grade 5 titanium and housing a bespoke movement from Petrodvoreds, Russia.

The matte hardware and day / night dial wonderfully suit  the submarine theme. This Teutonic design is something completely unparalleled and unique

Subdelta Periscope Dive watch U-Boat

Pur 2017 project is called the "Ace", a rugged, 42-mm, purpose-built tool watch made of grade 5 titanium and a sandwich dial providing maximum legibility day and night.

The heavily modified and re-engineered Swiss-Made hand-wound movement (ref. ETA 6497) is complete with swan neck regulators.

Subdelta Ace Fratellowatches Horloge Test review

Our2017 limited edition SUBDELTA Ace is a blue-faced, steel version of the Ace, called Blue Ace. Models either come with a polished crown or a bead blasted crown, both made of titanium.

Subdelta Blue Ace pilotwatch, handwound movement

Our 2019 limited edition watch is the SUBDELTA Quattro . This 40 mm tool watch with a Swiss mechanical heart has a unique revolving seconds cap, among other fine details and specs. This one-pointer is modified by hand by our Master Watchmaker and can be worn with the crown on either side and thus on either wrist. This can be achieved by swapping the strap halves: the dial has no north or south, so the watch can be turned around. 

Subdelta Quattro Onehand watch