Seiko
Prospex
SRPH77
On this page you can read about Seiko model Prospex SRPH77. 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 SRPH77. At the bottom of the page you can find similar watches from Seiko.
Important facts
The Seiko Prospex SRPH77 is applied with a hardlex crystal, Seiko's proprietary glass technology. It is more scratch resistant than plexiglass and less expensive than sapphire, therefore a good choice for mid range wristwatches.
This watch 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 timepiece 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.
The case of the Prospex reference SRPH77 is made out of stainless steel which is a strong and durable material, therefore being resistant to scratches, dents, and general wear and tear. Steel is also highly resistant to corrosion and rust, but is also a hypoallergenic material, which means that it is less likely to cause skin irritation or allergic reactions. Let's not forget the versatility of steel, which makes this watch pair well with several different attires.
The Seiko Prospex SRPH77 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
| bracelet length | 200 |
| brand | prospex |
| case back locking | screw down |
| case diameter | 43.2 |
| case material | stainless steel |
| case thickness | 12.6 |
| dive watch | |
| front crystal material | hardlex |
| gender | male |
| line name | sea |
| lug to lug | 44 |
| 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 | 104.0 |
Calibre specifications
| calibre no | 4 r35 |
| calibre type | mechanical |
| date function | |
| hackable | |
| jewel count | 23 |
| power reserve | 41h |
| winding mechanism | manual |
| winding mechanism | automatic |
Images
