For serious historians and professionals, the Mission Chronograph m250 b2 descends directly from the STS 99 Chronometer commissioned for a NASA astronaut in the late 1990s. This current edition preserves the same Valjoux/ETA 7750 movement, professional styling, and flight‑qualified specifications as the original, reaffirming its status as a bona fide American space‑flight watch. Assembled and regulated in Towson from Swiss and German components, it embodies our workshop's technical expertise and stands as a living testament to Towson Watch Company's contribution to American horology and space exploration.

For serious historians and professionals, the Mission Chronograph m250 b2 descends directly from the STS 99 Chronometer commissioned for a NASA astronaut in the late 1990s. This current edition preserves the same Valjoux/ETA 7750 movement, professional styling, and flight‑qualified specifications as the original, reaffirming its status as a bona fide American space‑flight watch. Assembled and regulated in Towson from Swiss and German components, it embodies our workshop's technical expertise and stands as a living testament to Towson Watch Company's contribution to American horology and space exploration.

The Mission Chronograph is powered by a highest-grade ETA Caliber 7750 automatic movement, regulated to chronometer-grade accuracy and adjusted to five positions by Towson Watchmakers. Featuring 25 jewels, a Nivarox hairspring, glucydur balance and an Incabloc shock absorption system. This self-winding movement has a power reserve of 48 hours and frequency of 28.800A/h. It is decorated in-house with blued screws, rhodium-plating, perlage, brand engraving, and geneva stripes. Seen through the sapphire crystal exhibition case-back.
A 42mm stainless-steel case houses our signature Carbon Guilloché dial adorned with rhodium-plated diamond hour-markers, spade-shaped hands, and sub-dial dividers. The TWC Shield is stamped on the dial in red, white, and blue to celebrate American watchmaking and our patriotic heritage.
The chronograph offers three elapsed counting functions for minutes, hours, and seconds. Start/stop and reset pushers are positioned on the side of the case. They are high-polished along with the lugs and trimming around the sapphire crystal. While the rest of the case is satin-finished, this variety of surface treatment elevates the formal appeal of this watch. The complex complication-set, which also includes a date window and tachymeter for tracking average speed, seamlessly blends with the formal intricacies of the dial, case and strap. This watch combines the best of traditional handmade watchmaking with Swiss precision and professional-grade durability.


The Mission Chronograph is powered by a highest-grade ETA Caliber 7750 automatic movement, regulated to chronometer-grade accuracy and adjusted to five positions by Towson Watchmakers. Featuring 25 jewels, a Nivarox hairspring, glucydur balance and an Incabloc shock absorption system. This self-winding movement has a power reserve of 48 hours and frequency of 28.800A/h. It is decorated in-house with blued screws, rhodium-plating, perlage, brand engraving, and geneva stripes. Seen through the sapphire crystal exhibition case-back.
A 42mm stainless-steel case houses our signature Carbon Guilloché dial adorned with rhodium-plated diamond hour-markers, spade-shaped hands, and sub-dial dividers. The TWC Shield is stamped on the dial in red, white, and blue to celebrate American watchmaking and our patriotic heritage.
The chronograph offers three elapsed counting functions for minutes, hours, and seconds. Start/stop and reset pushers are positioned on the side of the case. They are high-polished along with the lugs and trimming around the sapphire crystal. While the rest of the case is satin-finished, this variety of surface treatment elevates the formal appeal of this watch. The complex complication-set, which also includes a date window and tachymeter for tracking average speed, seamlessly blends with the formal intricacies of the dial, case and strap. This watch combines the best of traditional handmade watchmaking with Swiss precision and professional-grade durability.


Model: Mission Chronograph
Edition: Series Two
Collection: Mission Collection
Color Variant: Silver
Reference No: M250-2-S
Serial No: Engraved on case-back
Region of Manufacturer: Maryland, U.S.A.
Designed By: Hartwig Balke
Customization: Strap, Tachymeter, Engraving per Request
Warranty: Lifetime for Primary Owner



Model: Mission Chronograph
Edition: Series Two
Collection: Mission Collection
Color Variant: Silver
Reference No: M250-2-S
Serial No: Engraved on case-back
Region of Manufacturer: Maryland, U.S.A.
Designed By: Hartwig Balke
Customization: Strap, Tachymeter, Engraving per Request
Warranty: Lifetime for Primary Owner



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