Seiko · Prospex

Seiko Prospex Sea SPB519 1968 Heritage Diver's GMT

Reference SPB519J1 · GMT / travel · 42 mm

Specifications

Official product page · retrieved October 14, 2026

Enter your wrist circumference. The watch appears to scale on the flat top of the wrist.

Wrist circumference (cm)

Top view on a wrist, to scale

Side view, across the wrist

Comfortable

Lug-to-lug 48.6 mm on a flat top of 54.1 mm: 90 % of the width.

Lug-to-lug is 75 to 95% of the flat top, the usual comfortable range.

Brands rarely publish thickness, lug width and lug-to-lug together. Each observation below is kept separate, with who gave it.

Value	Type	Source	Date
13.3 mm	Official	Seiko	October 14, 2026

Value	Type	Source	Date
48.6 mm	Official	Seiko	October 14, 2026

Lug width is the gap between the lugs, where the strap fits. It is not lug-to-lug.

Value	Type	Source	Date
20 mm	Official	Seiko	October 14, 2026

Official Seiko · retrieved October 14, 2026

Watch	Ø	Thickness	Lug-to-lug	Calibre
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 Speedtimer SRQ047 Mechanical Chronograph SRQ047J1	42 mm	14.6 mm	49.5 mm	8R48

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
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