Image of Seiko Prospex SPB191

Seiko
Prospex
SPB191

On this page you can read about Seiko model Prospex SPB191. All the technical specifications like case material, case diameter and calibre attributes like movement type, power reserve etc. are listed here in an easy to understand tabular format. There are also images of Prospex SPB191. At the bottom of the page you can find similar watches from Seiko.

Important facts

The Seiko Prospex SPB191 has a screw-down crown which ensures a much better water resistance by providing a tighter seal between the crown and the case. This keeps moisture or dust from entering the watch case, which could otherwise cause damage to the movement. This also helps to prevent accidental adjustment of the time or date. The screw-down feature makes it more difficult for the crown to be accidentally turned, reducing the risk of incorrect timekeeping. Also, it is a reassuring feel to tighten the crown by screwing it down.

This watch has an automatic mechanical movement, which stores power in a mainspring, that is wound by an oscillating rotor while the watch is being worn. A mechanical watch movement is less accurate than a quartz one and requires regular servicing. It does not need a battery though and has a smoother sweeping seconds hand.

This timepiece has a sapphire crystal which provides a durable and clear viewing surface for the dial. This type of crystal is highly resistant to scratches and does not discolor over time. Sapphire is also resistant to most chemicals and less likely to shatter compared to other materials, making it a safer choice for the watch wearer. Thefore sapphire is a good choice for high-end wristwatches. It is of course an expensive option, compared to other materials, like plexiglass.

The Prospex reference SPB191 is a dive watch, meaning it was designed and built specifically for underwater use. All dive watches need to have water resistance of at least 20 bar / 200 meters, legibility in low-light conditions, a timing feature (e.g.: rotating bezel), running indicator and corrosion resistance.

Technical specifications

anti reflective coating inner
bezel material titanium
bracelet length 210
brand prospex
case back locking screw down
case coating super hard
case diameter 43.5
case material titanium
case thickness 13.3
clasp feature secure lock
clasp type folding
date magnifier Check
dive watch Check
front crystal material sapphire
gender male
line name sea
lug to lug 51
lume on bezel
lume on markers
lume on hands
manufacturer lume name lumi brite
rotatable bezel unidirectional
screw down crown Check
strap material silicone
water resistance meter 200
weight 99.0

Calibre specifications

calibre no 6 r35
calibre precision minus 15
calibre precision plus 25
calibre type mechanical
date function Check
hackable Check
jewel count 24
power reserve 70h
winding mechanism manual
winding mechanism automatic

Images

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