1979 Alaska Project IV Prototype for NASA Shuttle Pilots – Quartz LCD
October 6, 2018/
Omega Speedmaster Professional Quartz LCD
One of the 20 Prototype
(12 examples especially delivered to NASA to be tested by the
astronauts of the Space Shuttle program) reference 1860004 with calibre 1621 made in the 1979 during the Alaska Project IV for NASA Shuttle Pilots
Differing from the regular production version equipped with
caliber 1620 that had a switchable miniature light bulb; prototype cal. 1621 have tritium stripes (called the “BETA light”) as a permanent lighting system to keep illuminate the chronograph display.