The Mission M250: From TWC No. 1 to Today

How the Mission M250 developed from TWC No. 1, the chronograph worn on STS-99 in 2000, through each series to the current M250-2 and MM250-2.

The Mission M250 is Towson's signature chronograph. Its design goes back to TWC No. 1, the watch ESA astronaut Gerhard Thiele wore aboard Space Shuttle Endeavour on STS-99 in February 2000. The record of that flight, with the NASA certificate, is here: TWC No. 1: The Towson Chronograph Flown on STS-99.

A Towson chronograph on Gerhard Thiele's wrist aboard Space Shuttle Endeavour during STS-99
A Towson chronograph on Gerhard Thiele's wrist aboard Endeavour, February 2000.

Where it started

Towson Watch Company was founded in 1998 by Hartwig Balke and George Thomas. Balke, a German-born engineer, took charge of design and construction. Thomas, a watchmaker who had spent years restoring historic timepieces, took charge of regulation. Before there was a catalog, the two built one-off watches to order. The Masterpiece Archive records that work.

Their first chronograph followed a short brief: Swiss accuracy and German craftsmanship. That meant a Valjoux 7750, a steel case and a dial that reads at a glance. Chronographs from that first series were submitted for official Swiss chronometer testing, and No. 1 spent eleven days in orbit.

The Towson STS-99 Chronometer on a watchmaker's wrist
The STS-99 Chronometer at the workshop.

Hartwig Balke likes to say that a fine watch is a man's signature. The first chronograph was designed that way: for the person wearing it, with the brand kept quiet. The dial carried only the initials TWC, and the caseback carried the names of the crew.

Caseback of the first Towson Mission chronograph, engraved with the STS-99 crew names
The caseback carries the crew names and the mission designator around its border.

The same idea, refined

Every Mission since has kept the layout of No. 1: three registers, a tachymeter scale and a date. What changed over twenty years is the case, the dial finishing and, with the Mission Moon, the movement. The timeline below follows each step.

The evolution of the Towson Mission collection
The Mission collection, from the STS-99 Chronometer onward.

The current watches are the MISSION M250-2 and the MISSION MOON MM250-2.

Timeline

2000: STS-99 Chronometer

After the flight, Balke and Thomas made a small commemorative series to the same specification as No. 1. The dials were silver or black, with the TWC initials and the chronometer rating on the 6 o'clock register. Each had a rotor skeletonized by Jochen Benzinger and came with its COSC certificate.

Towson STS-99 Chronometer

2005: The TWC Chronograph

The first Towson collection kept the design of the commemorative series and refined it, with a signed caseback, a revised guilloché pattern and finer case finishing. Towson now regulated the movements itself, so the dial dropped the chronometer rating. Casebacks were engraved with the brand, USA and a serial number.

Towson Mission M250 series one details

2010: Mission M250

The chronograph became the Mission M250 and took the Towson shield on its dial. The 40 mm steel case has a mirror-finished bezel and satin sides. Rhodium hour markers and spade hands replaced the Roman numerals and painted scales. It came in silver or black, with an exhibition caseback engraved with the reference and serial number.

Towson Mission M250 series one, black dial

2015: Mission Moon MM250

The Mission Moon moved the collection to the Valjoux 7751. It adds a pointer date read by a central moon-tipped hand, and windows for moonphase, month and day. A corrector on the left side of the case works with the quick-set crown. The MM250 also introduced a copper dial.

The Towson Mission collection from the first chronograph to the Mission Moon

2020: Mission M250-2

The second series moved to a 42 mm steel case with crown guards, a satin-finished mid-case and bezel, and polished lugs. The dial changes are small. The sapphire exhibition caseback is engraved with the M250-2 reference, the serial number and Towson MD, USA. See the MISSION M250-2.

Towson Mission M250-2 chronograph

2022: Mission Moon MM250-2

The second-series Mission Moon shares the M250-2 case: 42 mm, brushed, with crown guards and anti-reflective sapphire crystal. The engine-turning on the registers is finer, and a skeleton rotor shows more of the 7751. The day corrector stays on the left side of the case. See the MISSION MOON MM250-2.

Towson Mission Moon MM250-2

Edition sizes for every reference are listed in the Mission collection reference guide.

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