M250 - B2

The first ever Towson Watch Company timepiece, the Mission Chronograph was designed and built in 2000 for an astronaut on a NASA STS-99 mission, which mapped the earth’s surface from the south of Greenland to the northern edge of the Antarctic. The instrument displays clean lines and extraordinary durability. Our latest M250-2 retains the elegant, confident, and explorative traits characteristic of the original M250 two decades ago while further bolstering its utility for space travelers.


Base : Valjoux cal. 7750 , 25 jewel , automatic chronograph 

Modifications : adjusted to 5 positions, Glucydure Balance, Nivarox Hairspring, Incabloc Shock Absorption , power reserve of 46 hours 

Functions : Sweep Second, Minute, Hour, Date, Stop Function with Minute Counter at 12-O’Clock and Hour Counter at 6-O’Clock, Constantly Rotating Second at 9-O’Clock, Start/Stop Pusher at 2-O’Clock, Back To Neutral Pusher at 4-O’Clock

*Decorated, modified and adjusted in Baltimore, MD. USA



Material : stainless steel handcrafted in Germany

Finish : satin midsection + lugs , satin bezel

Features : polished crown guards, exhibition back, free-standing chronograph push buttons

Dimensions : 42mm, 13.5mm width , 20mm lug width

Crystal : Scratch Resistant anti-reflex Sapphire crystal on front and back

Crown : push/pull , quickset function 

Depth Rating : 50 meters

*Designed, prototyped, finished and finished in Baltimore, MD. USA



Color : black , black tachymeter 

Detailing :  CNC guilloche , rhodium-plated hour markers , black-painted sub-dial indices +numerals 

Features : date window, three sub-dials , tachymeter 

Hands : white-painted (ref. M250-B2-WP) or rhodium-plated (ref. M250-B2-R)

*Designed, prototyped, and finished in Baltimore, MD. USA

Series : M250-2 (Mission | Series Two )

Reference(s) :  M250-B2 →  M250-B2-R (rhodium-plated hands), M250-B2-WP (white-painted hands)

Availability : Retired once the ‘No.100’ unit is completed for the entire M250-2 series


The Mission Chronograph was specifically designed for NASA astronauts two decades ago, as Commander Thiele of the Endeavor spacecraft wanted to suit himself and his fellow space companions with American-Made watches for their STS-99 mission. These chronographs proved to serve as faithful companions to the astronauts mapping the earth’s surface from the south of Greenland to the northern edge of the Antarctic. One of the watches is currently located at the National Watch and Clock Museum, commemorating a historic moment in modern horology. This inspired our signature M250, Towson Watch Company’s first collection series that still receives limited runs of 100 timepieces per reference every few years. 

Availability : Every case is uniquely numbered, referencing when it was made during the commercial availability of the M250-2 series, which has a total of 100 timepieces. 

Distribution : exclusively available for purchase here
Shipping : Fedex Priority 

Cost : free + zero liability to you

Returns : no returns

Warranty : lifetime (must be located in the official TWC customer registrar) 

Customization : strap

$ 2,850.00 USD
$ 2,850.00 USD
M250 - B2

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