Middle 39

Middle 39 Signal

MW-39S

00:00 to 04:00

$1,520

Marine-safety yellow, with the arc printed in navy. It is loud on purpose: you can find it on a dark nightstand. We made 120 because the dial printer charges per run.

120 made, 23 left

Ines replies within one working day with a payment link and a ship date. Put your wrist size in the email and we’ll size the bracelet before it ships.

Case

Case

39 mm steel, 46.5 mm lug to lug

Thickness

Thickness

11.4 mm

Lug width

Lug width

20 mm

Water resistance

Water resistance

200 m, screw-down crown at 4

Movement

Movement

Sellita SW300-1, automatic

Power reserve

Power reserve

56 hours

Accuracy

Accuracy

−2 to +6 seconds a day, checked in 5 positions

Crystal

Crystal

Double-domed sapphire, anti-reflective inside only

Lume

Lume

Super-LumiNova X1 C3 on hands and indices

Weight

Weight

142 g on the bracelet

In the box: the steel bracelet, a navy sailcloth strap, a strap tool, and the test card Ruth signs after the pressure test.

Notes from the bench

Why 12 to 4

On a merchant ship the second mate stands the 12-to-4, twice a day. Maren stood it for six years on product tankers. The arc on the dial covers those hours, so at 3 a.m. the hour hand sits inside it. You don’t need to know any of that to wear the watch. It is still the reason the dial looks the way it does.

What we left off

There is no logo, no “automatic” and no depth rating on the dial. The name is engraved on the caseback with the batch and serial number. Our first prototypes had a printed logo, and it made the dial harder to read in the dark, so it went.

How it fits

39 mm reads small on paper and right on the wrist. The lugs turn down sharply, so the 46.5 mm lug-to-lug sits inside a 6.5-inch wrist. If your wrist is over 8 inches, the Dog Watch GMT 40 wears better.

Middle 39 on a navy sailcloth strap lying on folded white sail with a brass grommet

Every reference ships with a sailcloth strap. Sam cuts them from sails retired by Hollis Sails, the loft downstairs, so no two have quite the same weave.

5-year warranty

Covers the movement, the case and the bracelet.

First service free

Strip-down, clean, regulation and new gaskets, once in the first five years.

Insured 2-day shipping

Free in the US by UPS. $45 to Canada, the UK and the EU, duties paid.

30 days to decide

Return it worn or unworn. Engraved casebacks are the exception.

MIDDLEWATCH

Six people above a sail loft at 212 Commercial Street in Portland, Maine. We build watches in batches of 300 and service every one we’ve sold.

It’s five bells in the middle watch (02:40 your time).

Workshop

Thursday and Saturday, 10 to 4, by appointment

A ship’s day, in seven watches. The yellow ones have a Middlewatch named after them.

Middle

00–04

Morning

04–08

Forenoon

08–12

Afternoon

12–16

First dog

16–18

Last dog

18–20

First

20–24

© 2026 Middlewatch Co. Assembled and regulated in Portland, Maine, around Swiss movements by Sellita.

© 2026 Middlewatch Co. Assembled and regulated in Portland, Maine, around Swiss movements by Sellita.

Create a free website with Framer, the website builder loved by startups, designers and agencies.