Rare Seikosha aviation chronometer (Imperial Japanese Army, WWII era)

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Rare Seikosha aviation chronometer (Imperial Japanese Army, WWII era):
$25000.00

This configuration belongs to an ultra-limited production batch estimated at fewer than 500–1000 units total. Given the destruction of Tokyo and the Japanese fleet in 1945, surviving operating examples with fully matching numbers are practically non-existent on the open market today. Museum-grade investment piece.For sale is an exceptionally rare, historically significant, and highly collectible mechanical aviation chronometer produced by the legendary Seikosha factory (now Seiko) during the early years of World War II (circa 1941–1942). This instrument represents a unique "cross-departmental" military order, merging high-precision navigation with Army/Air Service technical oversight.Key Technical & Historical Features:Matching Numbers (Maching): The serial number 497 is deeply stamped and matching on both the movement pillar plate and the brass reverse casing back. This guarantees 100% factory-original, unmolested condition.The Tokyo Depot "Kyō" (京) Inspection Stamp: The reverse of the brass casing features the rare military inspector's mark "京" (Kyō - Tokyo Military District/Depot) alongside the code "100". This confirms the chronometer underwent strict state acceptance testing and was distributed via the central Tokyo high-precision navigation equipment fund.
Gimbal Mechanism: The chronometer retains its original heavy brass gimbals (cardan suspension) ring used to keep the instrument level during intense motion.