Watch Almanac
Seiko

Prospex Diver's 200m

Ref. SPB103 · “Sumo”

Case diameter
45 mm
Manufacturer spec
Lug-to-lug
52.6 mm
Manufacturer spec
Thickness
12.9 mm
Manufacturer spec
Lug width
20 mm
Manufacturer spec
Snug, lugs near the edge
Wrist flat: 55.1 mmLug-to-lug: 52.6 mm

How the Prospex Diver's 200m wears

Its lugs add 7.6 mm to the 45 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 7.25" to 8.5" (18.4–21.6 cm); below 7.25" the lugs start to reach the edge of the wrist.

At 12.9 mm thick it is thicker than 52% of the 79 other dive watches we've measured, so expect it to sit tall on the wrist.

Its 20 mm lug width is one of the most common strap sizes; 104 other watches here share it, so aftermarket straps are easy to find.

Will the Prospex Diver's 200m fit your wrist?

With a 52.6 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.

WristFlat width (est.)Fit
6"47.2 mmLugs overhang
6.5"51.2 mmLugs overhang
7"55.1 mmSnug, lugs near the edge
7.5"59.1 mmIdeal fit
8"63 mmIdeal fit

Specifications

Reference
SPB103
Collection
Prospex
Status
In production
Case material
stainless steel
Crystal
sapphire
Water resistance
200 m
Bezel
unidirectional rotating 60-minute diver's bezel, green
Dial
green
Strap / bracelet
stainless steel bracelet, three-fold clasp with secure lock and extender
Weight
188 g
Style
Dive

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 20 mm straps. See other 20 mm watches and straps.

More Prospex references

Watches that wear the same size

Other watches within 1.5 mm of its lug-to-lug.

Same 20 mm lug width

All 20 mm watches

These take the same straps as the Prospex Diver's 200m.

Sources