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BACK TO COLLECTIONDiscovery Lume
The Discovery’s distinct crescent window displays GMT time, while the hands show your local time, making it effortless to read both at a glance. No oversized dials or cluttered displays—just a slim, stylish design that gives pilots and travelers instant clarity across time zones. Our Lume model features a fully luminescent dial! Check out our slider feature below to see it fully lit!
Strap Options
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Brown
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Green
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Water Resistant 100m -
PVD Coated 316L Stainless Steel
Water Resistant 100m
PVD Coated 316L Stainless SteelSpecifications
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F e a t u r e s
Case Back Engraving
Your watch, your mark. Every Discovery includes complimentary engraving—two lines, up to 12 characters each. Add your name, call sign, airmen #, or a message that makes it unmistakably yours.
THIN PROFILE
We don’t do bulky. Pilots told us they wanted a watch that worked with them, not against them. That’s why we designed ours with a slim, low profile—comfortable on the wrist and free from the snags that come with oversized cases.
GMT
GMT, simplified. Instead of a cluttered fourth hand, we built a clean 24-hour wheel. The result is quick, intuitive reading—no confusion between local and global time, just clear function with a distinctive look.
100M WATER RESISTANCE
Built for real-world conditions. With Viton® seals and gaskets, every Call Sign watch is engineered for durability and tested to 10 ATM water resistance. Ready for the cockpit, the ramp, or wherever the mission takes you.
x1 grade Super-LumiNova®
DIAL FULLY LUMINESCENT ON OUR LUME MODEL!
X1 Grade Super-LumiNova® is the highest-performance luminous material available, engineered to deliver brighter, longer-lasting afterglow than standard Super-LumiNova. Compared to lower grades and other lume options, X1 maintains visibility deep into the night, retaining up to 60% more brightness after extended hours in darkness. It’s the benchmark choice for premium timepieces where legibility and reliability matter most. This lume comes standard on all Call Sign timepieces.
Its Your time
Call Sign is built for everyday life—stylish enough for work or a night out, yet durable and practical for travel and adventure. It’s a watch that feels personal, with details that connect to your story and remind you of where you’ve been. More than just keeping time, it’s made to be worn, enjoyed, and lived in.
