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Seiko Rotocall SMGG19P1: The digital watch astronauts wore (when Casio was still in another league)
This SMGG19P1 is the reissue of a watch that made history: 37 mm of steel, an octagonal rotating bezel, and a system that doesn't require a 40-page manual to change the time. Just turn the bezel and you're set.
Media outlets like Esquire, Hypebeast, and Wallpaper have told the story: before G-Shocks took over and Casio became synonymous with digital watches, NASA astronauts chose to wear Seiko. The original Rotocall was so practical in space that it was used in over 160 Space Shuttle missions.
Among those who trusted it were three pioneers: Sally Ride, the first American woman in space; Kathryn Sullivan, the first to perform a spacewalk; and Anna Lee Fisher, the first mother to travel beyond the atmosphere. They wore it on their wrists while looking down at Earth—not because it was an official NASA-issued watch, but because it was the tool that worked best for them.
The bezel that isn't just for show: it's the remote control
What makes the Rotocall special isn't just that it's digital. It's how you use it. Instead of pressing impossible button combinations, you simply rotate the bezel.
Eight positions, eight functions: Time, Time Set, Timer, Counter, Stopwatch, Dual Time, Daily Alarm, and Single Alarm. Each side of the octagonal bezel has its function engraved. Align it with 12 o'clock, and the two side buttons let you adjust or use it. Simple, logical, and with that crisp click that confirms you've got it right.
The Display: Two levels, one glance
It features a dual-level screen. On top, the current mode; below, the data (time, minutes, seconds, etc.). The typography is the 1982 original, but the contrast has been improved for better legibility indoors and outdoors, and the backlight has been updated without losing its retro vibe.
The Color: Red and Black. The one that traveled to space most often.
The SMGG19P1 is the red and black model of the collection. The exact same look astronauts wore for 20 years, from 1982 until the final shuttle mission in 2002. Black dial, red details. This is the one.
Size: 37 mm that feels like 40
The steel case is 37 mm in diameter, but the lug-to-lug distance of 43.5 mm and its nearly square shape make it wear like a 39-40 mm round watch. It's the "sweet spot" for wrists from 160 to 200 mm.
The Crystal: Hardlex. Built to survive what even space couldn't break
It features Hardlex, Seiko's hardened mineral crystal. It remains flexible and shock-resistant—crucial in zero gravity where a sharp impact could shatter sapphire—but today's version is clearer and more durable than the 80s original.
Movement A824: Pure Quartz Reliability
Powered by the Seiko A824 caliber, a digital quartz module with ±20 seconds per month accuracy. No winding, no worries. Just change the battery every 2-3 years (uses a standard CR2016). It also features a side-lit LED system, staying true to the 80s aesthetic.
100 Meters: For the water, for the shower
Water-resistant to 100 meters with a screw-down case back. You can swim, shower, or snorkel. Just avoid using the side buttons underwater or deep-sea diving.
In short: A 37 mm digital Seiko with a rotating function selector, 100m resistance, real space history, and a design that returned from the 80s to stay. For those who know that before Casio, NASA wore Seiko.
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