Prospex Land Mechanical 38mm
Ref. SPB249
- Case diameter
- 38 mm
- Manufacturer spec
- Lug-to-lug
- 46.2 mm
- Manufacturer spec
- Thickness
- 12.9 mm
- Manufacturer spec
- Lug width
- 19 mm
- Manufacturer spec
Retail price $750 (US, Oct 2026)
How the Prospex Land Mechanical 38mm wears
Its lugs add 8.2 mm to the 38 mm case, close to the 7.1 mm typical across the almanac, so its diameter is a fair guide to how it wears.
On our fit model it sits best on wrists from 6.5" to 7.75" (16.5–19.7 cm); below 6.5" the lugs start to reach the edge of the wrist.
At 12.9 mm thick it is thicker than 85% of the 26 other field watches we've measured, so expect it to sit tall on the wrist.
Its 19 mm lug width is one of the most common strap sizes; 21 other watches here share it, so aftermarket straps are easy to find.
Will the Prospex Land Mechanical 38mm fit your wrist?
With a 46.2 mm lug-to-lug, here is how it wears across common wrist sizes. We estimate the flat top of each wrist from its circumference; measure yours for a closer answer in the fit finder.
| Wrist | Flat width (est.) | Fit |
|---|---|---|
| 6" | 47.2 mm | Snug, lugs near the edge |
| 6.5" | 51.2 mm | Ideal fit |
| 7" | 55.1 mm | Ideal fit |
| 7.5" | 59.1 mm | Ideal fit |
| 8" | 63 mm | Wears small |
Specifications
- Reference
- SPB249
- Collection
- Prospex
- Status
- In production
- Case material
- stainless steel
- Crystal
- curved sapphire
- Water resistance
- 200 m
- Bezel
- fixed steel
- Dial
- blue
- Strap / bracelet
- stainless steel bracelet, three-fold clasp
- Weight
- 146 g
- Style
- Field, Everyday
Movement
- Caliber
- Seiko 6R35
- Type
- automatic
- Power reserve
- 70 hours
- Frequency
- 21,600 vph (3 Hz)
- Jewels
- 24
- Accuracy
- +25/-15 s/day
6 other watches use the Seiko 6R35
Takes 19 mm straps. See other 19 mm watches and straps.
More Prospex references
- SeikoProspex 1965 Diver's Modern Re-interpretationSPB143 · “62MAS reinterpretation”
- Case
- 40.5 mm
- Lug-to-lug
- 47.6 mm
- Thick
- 13.2 mm
- SeikoProspex 1970 Diver's Modern Re-interpretationSPB317 · “Captain Willard”
- Case
- 41 mm
- Lug-to-lug
- 46.9 mm
- Thick
- 12.3 mm
- SeikoProspex AlpinistSPB507
- Case
- 39.5 mm
- Lug-to-lug
- 46.4 mm
- Thick
- 12.7 mm
- SeikoProspex AlpinistSPB503
- Case
- 39.5 mm
- Lug-to-lug
- 46.4 mm
- Thick
- 12.7 mm
- SeikoProspex AlpinistSPB121 · “Alpinist”
- Case
- 39.5 mm
- Lug-to-lug
- 46.4 mm
- Thick
- 13.2 mm
- SeikoProspex AlpinistSPB209
- Case
- 39.5 mm
- Lug-to-lug
- 46.4 mm
- Thick
- 13.2 mm
- SeikoProspex AlpinistSPB505
- Case
- 39.5 mm
- Lug-to-lug
- 46.4 mm
- Thick
- 12.7 mm
- SeikoProspex Diver SamuraiSRPB49 · “Samurai”
- Case
- 43.8 mm
- Lug-to-lug
- 48 mm
- Thick
- 13 mm
- SeikoProspex Diver's 200mSPB103 · “Sumo”
- Case
- 45 mm
- Lug-to-lug
- 52.6 mm
- Thick
- 12.9 mm
- SeikoProspex Diver's 200mSPB101 · “Sumo”
- Case
- 45 mm
- Lug-to-lug
- 52.6 mm
- Thick
- 12.9 mm
- SeikoProspex Sea TurtleSRPE93 · “Turtle”
- Case
- 45 mm
- Lug-to-lug
- 47.7 mm
- Thick
- 13.4 mm
- SeikoProspex Speedtimer MechanicalSPB513
- Case
- 39.5 mm
- Lug-to-lug
- 44.5 mm
- Thick
- 12 mm
- SeikoProspex Speedtimer Solar ChronographSSC911
- Case
- 41.4 mm
- Lug-to-lug
- 45.9 mm
- Thick
- 13 mm
- SeikoProspex Speedtimer Solar Chronograph 39mmSSC961
- Case
- 39 mm
- Lug-to-lug
- 45.5 mm
- Thick
- 13.3 mm
Watches that wear the same size
Other watches within 1.5 mm of its lug-to-lug.
- TudorMonarchM2639W1A0U
- Case
- 39 mm
- Lug-to-lug
- 46.2 mm
- Thick
- 11.9 mm
- LonginesMaster Collection 39mm (2026)L2.949.4.73.6
- Case
- 39 mm
- Lug-to-lug
- 46.1 mm
- Thick
- 9.4 mm
- BalticHermetique Tourer
- Case
- 37 mm
- Lug-to-lug
- 46 mm
- Thick
- 10.8 mm
- LorierHyperion GMTHYP3-BLK-DT-BRAC
- Case
- 39 mm
- Lug-to-lug
- 46 mm
- Thick
- 12.2 mm
- LorierNeptune (Series V, no-date)NEP5-BLK-ND-BRAC
- Case
- 39 mm
- Lug-to-lug
- 46 mm
- Thick
- 11.4 mm
- Seiko5 Sports SKX Sports Style GMTSSK001
- Case
- 42.5 mm
- Lug-to-lug
- 46 mm
- Thick
- 13.6 mm
Same 19 mm lug width
All 19 mm watchesThese take the same straps as the Prospex Land Mechanical 38mm.
- BulovaOceanographer Devil Diver 41mm96B350 · “Devil Diver”
- Case
- 41 mm
- Lug-to-lug
- —
- Thick
- 14.5 mm
- Grand SeikoElegance GMTSBGM221
- Case
- 39.5 mm
- Lug-to-lug
- 46.9 mm
- Thick
- 13.7 mm
- Grand SeikoElegance Spring DriveSBGA407 · “Skyflake”
- Case
- 40.2 mm
- Lug-to-lug
- 48.5 mm
- Thick
- 12.8 mm
- Grand SeikoGrand Seiko Elegance Manual-WindSBGW231
- Case
- 37.3 mm
- Lug-to-lug
- 44.3 mm
- Thick
- 11.6 mm
- Grand SeikoHeritage 9F Quartz 37mmSBGX261
- Case
- 37 mm
- Lug-to-lug
- 44.6 mm
- Thick
- 10 mm
- Grand SeikoSport 9F GMTSBGN027
- Case
- 39 mm
- Lug-to-lug
- 45.9 mm
- Thick
- 12.3 mm