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 | |
| dive watch | |
| 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 | |
| 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 | |
| hackable | |
| jewel count | 24 |
| power reserve | 70h |
| winding mechanism | manual |
| winding mechanism | automatic |
Images
