King Seiko 44KS 4420 Chronometer KSCM

Made by Daini Seikosha. Made from December 1963? 4420A hand-winding mechanical movement, 18,000 vph, with stop-seconds function (hacking) using an arm on top of the movement engaging with a gear on the wheel. Model designation KSCM. Initial model number 49999, which Chronometer in script type-face on the dial. Later model number 4420-9990. Made in stainless steel, and later also in cap gold. 4420-9990 model continued in cap gold version with Grand Seiko dial when it became a 44GS model.