Deskripsi
Seiko Prospex SRPF83K1 (often referred to as the “Baby Tuna” or “Street Series” Urban Safari Edition)
Circa: March 2021
SPECIFICATION
Movement: Seiko Caliber 4R35 automatic movement (supports manual winding and hacking).
Jewels: 23 jewels.
Power Reserve: Approximately 41 hours.
Case Dimensions: 43.2 mm diameter, 12.6 mm thickness, and a very compact 44.0 mm lug-to-lug length.
Case Material: Stainless steel inner case surrounded by a protective matte-finished outer shroud.
Crystal: Scratch-resistant Hardlex crystal.
Water Resistance: Air diver’s 200 meters / 660 feet (ISO-compliant for diving).
Luminescence: LumiBrite generously applied on the hands, prominent hour indices, and the accent section of the outer bezel.
Strap: Accordion-style olive green silicone strap (20mm lug width).
Calendar: Date window tucked cleanly between the 4 and 5 o’clock positions
=====
Collector’s Notes
The “Tuna” Heritage: This model traces its iconic design DNA directly back to Seiko’s legendary 1975 Professional Diver 600M. Collectors love the distinct protective outer shroud that earned the series its “Tuna Can” moniker.
Deceptively Wearable: While a 43.2mm diameter sounds intimidating on paper, the lack of traditional extended lugs results in a 44mm lug-to-lug footprint. This makes it sit incredibly flat and look surprisingly compact on smaller wrists.
Street Series Philosophy: Unlike standard utilitarian tool watches, the Urban Safari variations intentionally prioritize a tactical, casual aesthetic. The earthy matte olive green tones mixed with a textured beige and green unidirectional rotating bezel give it a distinct military/safari profile that sets it apart from typical black-dial divers.
Market Position: Powered by the robust 4R35 workhorse movement, this model occupies a sweet spot for entry-to-mid-level collectors looking for a distinct case architecture without stepping all the way up to premium MarineMaster price points.
