Tokyo, Japan

Seiko

Japanese watch manufacturer based in Tokyo.

www.seikowatches.com

Coverage so far

23 of 24 references have at least one lug-to-lug figure; the brand itself publishes one for 23.

Seiko references

Watch	Ø	Thickness	Lug-to-lug	Calibre
Presage Sharp Edged Series SPB165 SPB165J1	39.3 mm	11.1 mm	47.2 mm	6R35
Presage Classic Series SPB463 SPB463J1	40.2 mm	13 mm	46 mm	6R55
Presage Cocktail Time SRPB41 SRPB41J1	40.5 mm	11.8 mm	—	4R35
Presage Style60's GMT SSK013 SSK013J1	40.8 mm	13 mm	47 mm	4R34
Prospex Marinemaster 1965 Heritage Diver's SJE099J1	39.5 mm	12.3 mm	47.2 mm	6L37
Prospex Marinemaster 1968 Heritage Diver's SLA077 SLA077J1	42.6 mm	13.4 mm	49.3 mm	8L35
Prospex Sea SPB077 1968 Diver's Modern Re-interpretation SPB077J1	44 mm	12.7 mm	51 mm	6R15
Prospex Sea SPB101 SPB101J1	45 mm	12.9 mm	52.6 mm	6R35
Prospex Sea SPB145 1965 Heritage Diver's SPB145J1	40.5 mm	13.2 mm	47.6 mm	6R35
Prospex Sea SPB153 1970 Heritage Diver's SPB153J1	42.7 mm	13.2 mm	46.6 mm	6R35
Prospex Land SPB155 SPB155J1	38 mm	12.9 mm	46 mm	6R35
Prospex Sea SPB189 Titanium SPB189J1	43.5 mm	13.3 mm	51 mm	6R35
Prospex Land SPB209 SPB209J1	39.5 mm	13.2 mm	46.4 mm	6R35
Prospex Land SPB241 SPB241J1	38 mm	12.9 mm	46.2 mm	6R35
Prospex Sea SPB317 SPB317J1	41 mm	12.3 mm	46.9 mm	6R35
Prospex Land SPB377 Mechanical GMT SPB377J1	39.5 mm	13.6 mm	46.4 mm	6R54
Prospex SPB453 1965 Heritage Diver's SPB453J1	40 mm	13 mm	46.4 mm	6R55
Prospex Sea SPB481 SPB481J1	41.3 mm	12.5 mm	48.2 mm	6R55
Prospex Land SPB503 SPB503J1	39.5 mm	12.7 mm	46.4 mm	6R55
Prospex Speedtimer SPB513 Mechanical SPB513J1	39.5 mm	12 mm	44.5 mm	6R55
Prospex Sea SPB519 1968 Heritage Diver's GMT SPB519J1	42 mm	13.3 mm	48.6 mm	6R54
Prospex Speedtimer SRQ047 Mechanical Chronograph SRQ047J1	42 mm	14.6 mm	49.5 mm	8R48
Seiko 5 Sports SKX GMT SSK001 SSK001	42.5 mm	13.6 mm	46 mm	4R34
Seiko 5 Sports Field GMT SSK023 SSK023	39.4 mm	13.6 mm	47.9 mm	4R34

Calibres used by Seiko

Calibre	Power reserve	Frequency	Used in
4R34	about 41 h	—	3
4R35	about 41 h	—	1
6L37	about 45 h	28,800 vph (4 Hz)	1
6R15	about 50 h	—	1
6R35	about 70 h	—	9
6R54	about 72 h	—	2
6R55	about 72 h	—	5
8L35	about 50 h	28,800 vph (4 Hz)	1
8R48	about 45 h	—	1