SpecStudio
Click to inspect
Seiko Monster SRP313J1
Ref. SRP313J1 · Diver
$450Stock unknown
lug2lug doesn't sell watches. Buy links open the brand's or seller's own site. Some links here are affiliate links. lug2lug may earn a commission at no extra cost to you. Disclosures
Case
- Diameter
- 42mm
- Material
- Stainless Steel
- Water resistance
- 200m
- Caseback
- Solid
Crystal & dial
- Crystal
- Hardlex
- Shape
- Flat
- Dial color
- Black
- Indices
- Applied
Movement
- Caliber
- Seiko 4R36
- Type
- Automatic
- Beat rate
- 21,600 vph
Seiko
Seiko's day-date automatic caliber and the in-house branded version of the NH36 with stricter quality control and finishing. The additional day wheel over the 4R35 adds the day-of-week complication without changing the movement dimensions. Found extensively in the Seiko 5 Sports and Prospex lines, it offers Seiko's proven reliability with the convenience of day-date display at a mainstream price point.
Monster collection · 2 watches
Market
Retail$450
The forum market
Follow the asking price.
Active listings0Across watch forums
Closed · 90d0Asking-price history
No forum listings tracked for this watch yet. Market+ adds the weekly trend.
Retail stock & market context
Seiko on the secondhand market
+10.1%
2026 so far · +5.2% to +17.0% · 103 matched watches
In line with the index
Divers as a group: +6.1% · 368 matched watches
Year-by-year readings →Similar watches
Community
The Seiko Monster SRP313J1 is praised for its updated 4R36 movement offering hacking and hand-winding, and its bright LumiBrite lume. One owner notes their watch runs at +480 seconds per day. Another owner finds the "teeth indices" of second-generation Monsters more fitting to the "monstrous" aesthetic, considering the SRP313J1 sleeker. On balance, owners and reviewers find the Seiko Monster SRP313J1 appealing for its modern movement features and strong lume, though aesthetic preferences vary.
Open the discussion
On real wrists
No shots yet. Show how it wears.
Related