The Tool Desk
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What the Seiko 5 Sports SRPJ85 offers
The SRPJ85 combines a 36.4 mm case with Seiko’s 4R36 automatic movement, manual winding, and a day/date display. Seiko lists approximately 41 hours of power reserve, a curved Hardlex crystal, LumiBrite on the hands and indexes, a nylon band, and 10 bar water resistance. Its lug-to-lug length is 44.4 mm, thickness is 12.5 mm, and lug width is 18 mm. Seiko’s US product page listed the price at USD 315 when retrieved; price and availability may change.
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Timex Men's Expedition Scout 40mm Watch, Gray Case, Black Dial | $54.26 | Buy on Amazon |
Is the SRPJ85 a compass watch?
No compass bezel or compass ring appears in the SRPJ85’s official specifications. Seiko’s manual describes a sun-based direction method for watches fitted with a compass bezel or ring; it is not a special SRPJ85 feature. The manual says, “The compass is so designed to provide only a rough indication of directions, and should not be used where accuracy is critical.” Seiko Watch Corporation’s instruction manual also limits the method to situations where the sun is visible or its position is known, and notes that it may not work properly in certain low-latitude areas at certain times of year.
What Seiko’s sun method says
For the Northern Hemisphere, Seiko instructs the wearer to keep the dial level, point the hour hand toward the sun, and position the “S (South)” mark on the rotating compass bezel midway between 12 o’clock and the hour hand’s indicated time. The Southern Hemisphere procedure differs. These directions apply only to models with the relevant compass bezel or ring, and offer rough orientation—not reliable navigation or a rescue method.
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- Black Dial Design: Black dial with full Arabic numerals pairs with an adjustable leather strap for a rugged, outdoor look
- Adjustable Strap: A comfortable band fits securely up to an 8-inch wrist circumference for everyday wear, day in and day out
- Indiglo Backlight: A push of the button illuminates the dial and luminous hands in the dark, day or night, rain or shine
- All-Weather Durability: A mineral glass crystal and water resistance to 50 meters keep this field watch ready for daily wear
- Built to Last: A Timex watch is designed for durability and everyday reliability; every piece reflects our commitment to quality without compromise
If you need to navigate accurately or safely, use a dedicated navigation method and appropriate equipment rather than relying on this watch or the analog-watch sun method.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.SRPJ85 vs. SRPG35: size and specifications
The SRPG35 is the larger of the two field-style models. The listed dimensions and specifications can help with case-size and strap-width decisions; they do not establish how either watch will feel on a particular wrist or how accurately it will run in everyday use.
| Specification | SRPJ85 | SRPG35 |
|---|---|---|
| Case diameter | 36.4 mm | 39.4 mm |
| Lug-to-lug | 44.4 mm | 48.1 mm |
| Thickness | 12.5 mm | 13.2 mm |
| Lug width | 18 mm | 20 mm |
| Movement | 4R36 automatic with manual winding | 4R36 automatic with manual winding |
| Power reserve | Approximately 41 hours | Approximately 41 hours |
| Crystal | Curved Hardlex | Curved Hardlex |
| Water resistance | 10 bar | 10 bar |
| Luminous material | LumiBrite on hands and indexes | LumiBrite on hands and indexes |
| Band | Nylon | Nylon |
Specifications are from Seiko’s SRPJ85 and SRPG35 product pages. The smaller SRPJ85 has an 18 mm lug width; the SRPG35 uses 20 mm. Check the width before buying a replacement or alternate strap.
Quick Recap
What to consider before choosing
- Case fit: Compare both diameter and lug-to-lug length against a watch you already find comfortable. The SRPJ85 is smaller on both listed dimensions.
- Strap compatibility: Choose an 18 mm strap for the SRPJ85 or a 20 mm strap for the SRPG35.
- Navigation needs: The SRPJ85’s listed features do not include a compass. Neither model should be assumed to provide compass guidance based on its field-style design.
- Price and value: Seiko’s US SRPJ85 listing showed USD 315 at retrieval, but that regional listing is not a current cross-retailer price comparison or a broad value ranking.
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.
