These informations were mostly gathered through my own experience, from watches I actually had in hands. They reflect what I observed and are not the holy truth. Page updated July, 2nd 2024 : KS 5621-7000 added.
Text & Pictures : D. Broglin – Watch & Vintage
This is an attempt to list all King Seiko models and their variations. Work in progress of course !
King Seiko 44KS (1964-1968)
44, 4402 & 4420 movements
44-2000
2000 RAD dial
AGF (All Gold Filled) case
2 types of crown

44-2000, 1964
44-9990 KSK
36.5 x 44.2 mm
9990R AD dial
1964-1968

King Seiko 45KS (1968-1973)
45, 4502 & 4420 movements
7010 case
8000 case
8010 case
King Seiko 52KS (1970-1975)
5245 & 5246 movements
7000 case
King Seiko 56KS (1968-1975)
5621 movement – time only
7000 case
monobloc
36.3 x 41.2 mm
7000T dial
7010T dial
acrylic crystal
1968-1972

black 7010 dial
5625 & 5626 movements, which had the same cases
5020 case
5030 case
6020 case
1972
Stainless steel bracelet

1972
7020 case
7030 case
7050 case
7090 case
7070T dial
Chronometer Officially Certified
7100 case
7100T dial
Chronometer Officially Certified
7111 case
SS, SGP or GCAP
7110R, 7110T dials
Screw back
1972-1973
7120 case
8001 case
8000T dial
Screw back
Pressed crystal
8011 case
8010T dial
Screw back
Pressed crystal
Seiko KS Vanac (1971-1975)
5626 movement
The Seiko King for sale
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Seiko King KS Hi-Beat 5625-7111, 1972€ 590.00
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King Seiko Hi-Beat 45KSC 4502-7010, 1971€ 650.00
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Product on saleKing Seiko KSSK 4402-8000, 1967Original price was: € 730.00.€ 650.00Current price is: € 650.00.
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Product on saleSeiko King KS Hi-Beat 5626-7040 Chronometer, 1971Original price was: € 890.00.€ 750.00Current price is: € 750.00.