# Best Seiko dive watches: Turtle, Monster, Samurai and 5 Sports Source: https://lumeandbezel.com/best/best-seiko-dive-watches Publisher: Lume & Bezel. Picks are chosen from what each Amazon listing states, not from hands-on tests. Method: https://lumeandbezel.com/how-we-pick Seiko makes divers at almost every price, and the names can be confusing. The Prospex line holds the ISO-rated 200 m divers like the Turtle, Monster and Samurai families. The 5 Sports line has the dive look with 100 m water resistance. Inside the case, most of these share the same 4R family: the 4R35 with date only, or the 4R36 with day and date, both with about 41 hours of reserve where stated. So the real differences are case size, lug to lug, crystal (Hardlex or sapphire) and bezel. This guide sorts eight Seiko divers from 41.7 mm to 45 mm and lists every size the listing gives. Where a listing skips lug to lug or thickness, it says Not stated. Prices run from $315 to $1,045, and only listing facts are used. ## Picks ### 1. Seiko SEIKO Wristwatch PROSPEX Prospex Mechanical Automatic Winding Made in Japan Japanese-made Save the Ocean Special Edition Turtle Diver's Diver's 656.1 ft (200 m) Sapphire Glass SRPF77 Men's Case size: 45.0 mm; Lug to lug: 47.7 mm (listed case height); Thickness: 13.2 mm; Movement: 4R36 automatic; Crystal: Sapphire; Water resistance: 200 m diver A 45 mm Turtle diver with a 47.7 mm case length, sapphire crystal and 22 mm lug width. The listing states it fits wrists up to about 8.1 inches. What the listing offers: - Wide 45 mm case with a short 47.7 mm case height, so it wears big without overhanging. - Sapphire crystal and 200 m diving water resistance, per the listing. - The listing states a maximum wrist circumference of about 8.1 inches (205 mm). Limits to know: - The day-date language mix arrives at random, the listing says, so it cannot be chosen. - Silicone strap only, with no bracelet included. ### 2. SEIKO SRPD59 Automatic Watch for Men - 5 Sports - Orange Sunray Dial, Day/Date Calendar, LumiBrite Hands & Markers, and Rotating Bezel, 100m Water-Resistant Case size: Not stated; Lug to lug: Not stated; Thickness: Not stated; Movement: 4R36 automatic; Crystal: Not stated; Water resistance: 100 m An SRPD with an orange sunray dial on a steel bracelet. The listing states the 4R36, day/date, LumiBrite hands and markers, a unidirectional bezel and 100 m water resistance. What the listing offers: - 100 m water resistance and a unidirectional rotating bezel are stated on the listing. - LumiBrite on hands and markers per the listing for low-light reading. - A see-through skeleton case back and steel bracelet are stated. Limits to know: - Case size is not stated on this listing, though other SRPD listings state 42.5 mm. - The listing does not state the crystal type. ### 3. SEIKO SRPK01 Automatic Diver Watch Men's Prospex - Blue Case size: 45 mm; Lug to lug: Not stated; Thickness: Not stated; Movement: 4R36 automatic; Crystal: Sapphire with magnifier; Water resistance: 200 m diver A 45 mm Prospex PADI Special Edition diver. The listing states the 4R36 with day/date, 200 m with screw-down crown and case back, sapphire, a ceramic bezel display and LumiBrite. What the listing offers: - The listing rates it for diving to 200 m, with a screw-down crown and screw case back. - Sapphire with inner anti-reflective coating and a ceramic bezel display, per the listing. - LumiBrite on hands, indexes and bezel is stated for low-light reading. Limits to know: - The 45 mm case per the listing will be large on small wrists. - 41-hour reserve per the listing is about half of the Mido or Hamilton. ### 4. SEIKO SRPL11 Automatic Diver Watch Men's Prospex - Red Case size: 41.7 mm; Lug to lug: 49.5 mm; Thickness: 12.3 mm; Movement: 4R35 automatic; Crystal: Hardlex; Water resistance: 200 m diver A full Prospex dive watch with a 4R35 movement and 200 m diver's rating. The listing gives every key dimension, including 12.3 mm thickness and 49.5 mm lug to lug, so fit is easy to judge. What the listing offers: - Rated to 200 m for diving with a screw-down crown and screw case back, according to the listing. - The 4R35 hand-winds, has a stop-second function and about 41 hours of power reserve, per the listing. - LumiBrite on hands, indexes and bezel is stated, which helps in low light. Limits to know: - At 49.5 mm lug to lug it is the longest case here, so smaller wrists may see overhang. - Hardlex crystal is harder than mineral glass but still not sapphire. ### 5. SEIKO SRPF03 Automatic Dive Watch for Men - Prospex Special Edition Case size: 43.8 mm; Lug to lug: Not stated; Thickness: Not stated; Movement: 4R35 automatic; Crystal: Not stated; Water resistance: 200 m (ISO) A Prospex Special Edition diver that the listing calls ISO scuba approved to 200 m. It pairs the 4R35 with LumiBrite hands and markers in a 43.8 mm steel case and bracelet. What the listing offers: - The listing states ISO scuba approval to 200 meters. - LumiBrite hands and markers are stated for low-light legibility. - The 4R35 movement has a 41 hour power reserve, according to the listing. Limits to know: - At 43.8 mm it wears large, and lug to lug length is not stated. - Crystal type and bezel details are not stated on this listing. ### 6. SEIKO SRPJ93 Automatic Diver Watch Men's Prospex - Blue Case size: Not stated; Lug to lug: Not stated; Thickness: Not stated; Movement: 4R35 automatic; Crystal: Sapphire with magnifier; Water resistance: 200 m diver A blue PADI Special Edition Prospex diver on a silicone band. The listing states the 4R35 with 23 jewels, 200 m, screw-down crown, sapphire and a ceramic bezel display. What the listing offers: - 200 m diver's rating with screw-down crown and screw case back, per the listing. - Sapphire with inner anti-reflective coating and a ceramic bezel display are stated. - Hand-winding and a stop-second function are stated for the 4R35. Limits to know: - Case size is not stated on this listing. - It ships on a silicone band per the listing, not a bracelet. ### 7. Seiko SRPG57K1 SRPG57K1 Wristwatch, Mechanical, Automatic, Save the Ocean Special Edition, Monster Diver's, 68.4 ft (200 m), Men's, Bracelet Type Case size: 42.4 mm; Lug to lug: 49.4 mm (listed case height); Thickness: 13.4 mm; Movement: 4R36 automatic; Crystal: Hardlex; Water resistance: 200 m A Save the Ocean Monster diver with a 42.4 mm case, 49.4 mm case height and steel bracelet. A bold diver for a broad wrist under $650. What the listing offers: - 49.4 mm case height gives a long footprint that suits a large wrist. - Caliber 4R36 with hand winding, hacking seconds and day-date, per the listing. - Stainless steel case and bracelet with 200 m water resistance. Limits to know: - Hardlex crystal, not sapphire, on a $625 watch. - Calendar language is bilingual and cannot be specified, the listing says. ### 8. Seiko Prospex King Samurai Diver's 200m Automatic Sports Watch SRPH43K1 Case size: 43.8 mm; Lug to lug: Not stated; Thickness: 12.8 mm; Movement: 4R35 automatic; Crystal: Anti-reflective sapphire with cyclops; Water resistance: 200 m diver A King Samurai diver in a 43.8 mm by 12.8 mm case with anti-reflective sapphire. The Samurai pick, though priced well above the other 4R35 models. What the listing offers: - Anti-reflective sapphire with cyclops lens, per the listing. - Case measures 43.8 mm by 12.8 mm, slimmer than the Turtle and Monster. - Caliber 4R35 with hand winding and about 41 hours of reserve. Limits to know: - $1,045 for the same 4R35 movement as the $476 SRPL11. - Lug to lug and strap type are not stated. As an Amazon Associate I earn from qualifying purchases.