2025 Seiko Prospex Turtle Black 45mm 'Kanji' Day SRPE93K1

Here we have a 2025 Seiko Prospex Turtle Black 45mm 'Kanji' Day SRPE93K1, featuring the iconic 45mm “Turtle” cushion case, a staple of Seiko’s diving heritage. The Prospex "Turtle" lineage traces back to the legendary 6309 diver of the 1970s, beloved by enthusiasts for its rugged reliability and distinctive organic silhouette. This modern iteration continues that legacy, serving as a robust ISO-rated diver that remains one of the most recognisable shapes in the watch world. The lug-to-lug of 47.5mm and a case thickness of 12.5mm allow the watch to wear surprisingly compact on the wrist despite its diameter, thanks to those signature short, contoured lugs. At 4 o'clock, the recessed screw-down crown is positioned for maximum comfort and impact protection, allowing hand-winding, hacking, and quick-set adjustments to the day and date. A unidirectional rotating bezel with a classic black 60-minute insert surrounds a flat Hardlex crystal. The deep matte black dial provides a high-contrast backdrop for the oversized, "LumiBrite" filled circular and shield indexes, ensuring legibility in the darkest depths. At 3 o’clock, the "Kanji" day-date window pays homage to Seiko’s Japanese roots, allowing the wearer to toggle between English and Japanese scripts. Bold "sword and arrow" hands, also generously filled with lume, are paired with a lollipop seconds hand for clear tracking. On the reverse, the screw-down case back features the famous Tsunami relief logo along with the serial number. Inside is the reliable Automatic Seiko Cal. 4R36, a 24-jewel workhorse movement. The watch comes fitted on a 22mm black silicone accordion-style diver's strap.

This watch is sold with its original Seiko box, swing tag and paperwork. The watch comes paired with its original Seiko 22mm black silicone accordion-style diver's strap. The watch is from March 2025 and is sold in worn and enjoyed condition. The watch comes with our 12-Months Warranty.

The Turtle is one of those watches that just works, no matter who wears it. Despite the 45mm case size, it sits incredibly comfortably thanks to the curved “cushion” design and short lugs, and it never feels as large as the numbers suggest. The Kanji day-date adds a nice bit of character, and the whole thing has that classic Seiko tool-watch fit and feel. Add this affordable diver to your collection today!

Reference : SRPE93K1 (4R36-04Y0)
Movement : Automatic Seiko Cal. 4R36
Age : March 2025
Year : 2025
Case Size : 45mm
Case Thickness : 12.5mm
Lug to Lug : 47.5mm
Lugs : 22mm
Condition : Pre-Owned
Box and Papers : Box & Papers
Case Material : Stainless Steel
Warranty : 12-Months Warranty
The wrist model's wrist size is 7inch

Seiko's history began in 1881 when Kintaro Hattori established the K. Hattori retail and repair store. In 1892, Seikosha was established to make wall clocks. 1895 saw the production of their first pocket watch. 1913 saw the launch of their first wristwatch, the Laurel. In 1924, the first Seiko was manufactured. Daini Seikosha (now Seiko Instruments Inc.) was established in 1937. Seiko was listed on the Tokyo stock exchange in 1949. The Suwa factory became independent and formed Suwa Seikosha Co., Ltd. (now Seiko Epson Corporation in 1959). In 1956, Seiko launched Marvel as their first true in-house-made watch; they continued to make this watch until 1959. The Seiko Lord Marvel, introduced in 1958, was Seiko's first luxury watch, predating the well-known Grand Seiko. It was designed to rival Swiss brands with a refined design and higher specifications. In 1967, Seiko launched the calibre 5740C watch movement, a significant upgrade over the earlier calibre 5740A, which beat at 18,000, and the 5740B, which beat at 19800. This movement was special because it allowed the watch to run at a high speed of 36,000 beats per hour, making it Japan's first high-frequency watch. In fact, it was only the second watch movement of its kind in the world, following one released by a Swiss brand just a few months earlier. Japan’s first chronograph watch was introduced for the 1964 Tokyo Olympics; it was called the Seiko Crown Chronograph monopusher. Not stopping there, Seiko launched Japan's first true divers' watch, the Seiko Diver’s 150M, fitted with the automatic Calibre 6217, which was later given the nickname “62MAS” by collectors. King Seiko and Grand Seiko emerged as prominent lines within the Seiko brand, with King Seiko making its debut in 1961 as a distinguished luxury watch collection. Grand Seiko, on the other hand, has consistently set the standard for exceptional craftsmanship and precision engineering. In 1965, Seiko introduced a groundbreaking manual-wind movement featuring 25 jewels and hacking seconds, coinciding with the launch of the second-generation KSK series, which boasted sharp, angular cases and robust, flat-ended lugs. The King Seiko KCM was introduced in 1969, featuring a chronometer-certified movement that operates at an impressive 36,000 beats per hour, along with a sleek C-shaped stainless steel case. In 1975, the King and Grand Quartz brands were introduced, built at the Suwa Seikosha and Daini Seikosha factories. In 1977, a high-end Twin Quartz Cal. 92 was produced until 1979, when the 97KQ and 99KQ were introduced. The final 1981 King Quartz Cal. 94KQ movement remained in production until Seiko ended the King Seiko line in 1985. Despite the challenges during the Quartz crisis of the 1970s that led to the gradual shutdown of King Seiko production, Seiko made a comeback in 2022 by reintroducing the classic King Seiko collection. The company name was changed to the Seiko Corporation in 1990. Innovation at Seiko continues today with GPS Solar watches.