The Seiko SRP313K1 is part of the second-generation Monster family, often called the “New Monster” and associated by specialist references with the “Dracula” nickname. Its 4R36 movement has day-and-date display, automatic and manual winding, and a manufacturer-stated power reserve of more than approximately 41 hours. A retailer lists the SRP313K1 with 200 m water resistance, but that listing is not proof that a particular used watch remains safe for immersion.
What is the Seiko SRP313K1?
The SRP313K1 belongs to the SRP313 family in Seiko’s second-generation Monster lineage. Specialist reference guide Plus9Time associates the model with the “Dracula” nickname and identifies its movement as the 4R36. Nicknames and family names are useful search terms, not substitutes for checking the exact reference on the watch and its listing.
| # | Preview | Product | Price | |
|---|---|---|---|---|
| 1 |
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SEIKO SRPF03 Automatic Dive Watch for Men - Prospex Special Edition | $440.00 | Buy on Amazon |
| 2 |
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Casio Men's MDV106-1AV 200M Black Dive Watch (MDV106-1A) | $68.99 | Buy on Amazon |
| 3 |
|
SEIKO SRPL51 Automatic Diver Watch Men's Prospex - Blue | $476.00 | Buy on Amazon |
For a specific listing, compare the stated reference with clear photos of the watch, dial, case back, and included documentation. A seller’s title alone may not establish which reference or variant is being offered.
What does the 4R36 movement offer?
Seiko’s 4R35/36/37/38/39 technical specifications describe the 4R36 caliber family as having three hands with day-and-date display, automatic winding with a manual-winding mechanism, 24 jewels, and a rate of 21,600 vibrations per hour.
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#1 Best Overall
- WATER-RESISTANT: these water-resistant men's dive watches are ISO scuba-approved to depths of 200 meters
- AUTOMATIC: these self-winding, automatic men's watches are powered by your movement, with a power reserve of 41 hours
- STAINLESS STEEL: features a durable 43.8mm stainless steel watch case and bracelet.
- LUMIBRITE DISPLAY: this men's automatic watch features a highly-legible display with LumiBrite hands and markers
- 4R35 CALIBER: equipped with the reliable caliber 4R35 automatic movement, this accurate men's watch keeps precise time
Seiko gives continuous operating time as more than approximately 41 hours. That is a caliber-family specification, not a measurement of a particular SRP313K1 or a guarantee about the reserve remaining in a watch with unknown condition or service history. The document also lists magnetic resistance of 4,800 A/m (60 gauss).
What specifications are reported for the case and strap?
A Long Island Watch SRP313K1 listing describes a stainless-steel case, domed Hardlex mineral crystal, rubber dive strap, 20 mm lug width, day/date display, and 200 m water resistance. These are retailer-reported model specifications; the cited listing is not current manufacturer documentation for this exact reference.
Rank #2
- Stainless Steel case with Black Resin Band
- Black Dial with date window at 3 O'clock
- Luminous markers and hour hands; sweep second hand
- Anti-reverse bezel
- Water-resistant to 200 M (660 feet)
The 20 mm figure is a useful starting point when considering a replacement strap, but it does not establish compatibility with any particular strap or end fitting. Confirm the actual lug width and fit requirements on the watch before ordering.
What can you conclude about accuracy and legibility?
A 2013 owner review at C-segment Wrist Watches describes its example as legible with bright lume. The writer also estimated that the watch gained about five seconds per day, while explicitly noting the lack of legitimate timing equipment. That is one owner’s impression and an unverified anecdote, not a dependable accuracy specification or evidence of how SRP313K1 watches perform generally.
Rank #3
- STAINLESS STEEL CASE built to endure with style, making this watch your perfect daily companion
- AUTOMATIC MOVEMENT for seamless precision in every tick of this watch
- SCRATCH-RESISTANT CRYSTAL to maintain a pristine look even with daily wear and tear on your watch
- LUMINESCENT HANDS for effortless readability in low-light conditions, ensuring you never miss a moment with this watch
- WATER RESISTANT DESIGN ensuring your watch is ready for any adventure, rain or shine
What should you check before buying an example?
The available sources do not establish current production status, market price, or availability. They also do not verify the condition of any individual watch. Treat a historical 200 m rating as a model listing detail, not confirmation that an older or used watch is still sealed: water resistance can depend on the condition and maintenance of the specific watch.
- Reference: Ask for clear photos and verify that the watch is actually identified as SRP313K1 or the intended SRP313 variant.
- Condition and service: Ask what work has been done and when. If immersion matters, request recent water-resistance or pressure-test documentation rather than relying on the original rating.
- Parts: Check whether the strap and other included parts are original or replacements, and confirm any replacement strap’s fit before purchase.
- Seller: Evaluate the seller’s return terms, description, and evidence for the watch’s identity and condition.
- Price: Compare the asking price with current listings for the same reference and condition; no current price benchmark is established here.
Seiko’s manual cautions that “The specifications are subject to change without prior notice for product improvement.” For this review, the movement figures are the manufacturer’s caliber-family specifications, while the cited case and strap details come from a retailer listing.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
