Click to inspect
Case
41.2mm
Power Reserve
41h
Movement
Automatic
Water Resistance
100m
01
Case Dimensions
Diameter41.2mm
Thickness11.8mm
Lug-to-Lug48.5mm
Lug Width20mm
02
Case Build
Water Resistance100m
03
Crystal & Dial
CrystalHardlex
04
Movement
Caliber
TypeAutomatic
Beat Rate—
Power Reserve41 hours
Jewels23
HackingNo
Hand-WindingNo
ComplicationsTime only
05
Design Language
Dial styleSunburst
BezelFixed
Bracelet / strapLug-attached bracelet
HandsBaton
AI-detected from product image · 5/22/2026
In a nutshell
The Seiko Essentials Automatic (ref. srph87) is an automatic dress watch, with a 41.2mm case, 11.8mm thick, powered by the 4R35 movement and a 41-hour power reserve. Water resistance is rated to 100m, under a hardlex crystal. Manufacturer MSRP is $315.