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Seiko SRP777 (Turtle) Specifications
| Reference | SRP777, SRP777K1 |
|---|---|
| Case Size | 45mm |
| Lug Width | 22mm |
| Lug-to-Lug | 48mm |
| Thickness | 13.4mm |
| Case Material | stainless steel |
| Crystal | Hardlex |
| Water Resistance | 200m |
| Movement | 4R36 (automatic) |
| Bezel | rotating dive bezel |
| Crown | screw-down |
| Case Back | screw-down |
| Price Range | $300-$450 |
Compatible Straps for the Seiko SRP777 (Turtle)
The SRP777 (Turtle) uses a 22mm Lug Width and is compatible with the following strap types.
| Type | Recommended Brand | Why It Works | Price Range | Link |
|---|---|---|---|---|
| NATO/ZULU | Strapcode | Classic look, easy to swap, fits 22mm lugs | $15–$80 | |
| rubber/silicone | Crafter Blue | Water-resistant, comfortable for daily wear | $15–$80 | |
| oyster bracelet | Uncle Seiko | Sporty bracelet, solid end links available | $15–$80 | |
| jubilee bracelet | Barton | Classic bracelet style, comfortable links | $15–$80 | |
| leather | Archer | Dresses up the watch, fits 22mm lugs | $15–$80 | |
| canvas | Strapcode | Casual, durable field-watch aesthetic | $15–$80 |
Replacement Parts for the Seiko SRP777 (Turtle)
| Part | Description | Compatibility Note |
|---|---|---|
| crystal (Hardlex or sapphire upgrade) | Protective cover over the dial | Fits 45mm case |
| bezel insert | Outer ring marking | Matches rotating dive bezel configuration |
| chapter ring | Inner ring with minute markings | Specific to 45mm case |
| crown with stem | Time-setting knob on case side | screw-down type |
| spring bars | Pins that hold the strap to the case | 22mm, 1.5mm diameter recommended |
| case back gasket | Seal that maintains water resistance | Required for 200m WR rating |
| click spring | Spring that provides bezel rotation clicks | Fits 45mm case back |
Modding the Seiko SRP777 (Turtle)
The SRP777 (Turtle) is a popular platform for modding. Here are the most common modifications.
- bezel insert — Swap the stock bezel insert for a ceramic, lumed, or differently colored option.
- crystal upgrade to sapphire — Upgrade the stock mineral/Hardlex crystal to a scratch-resistant sapphire crystal.
- chapter ring — Replace with a contrasting or lumed chapter ring for improved readability.
- dial swap — Install an aftermarket dial for a completely new look.
- coin-edge bezel — Swap the stock bezel insert for a ceramic, lumed, or differently colored option.
Frequently Asked Questions
What lug width is the Seiko Turtle SRP777?
The Seiko SRP777 Turtle has a 22mm lug width.
What is the best rubber strap for the Seiko Turtle?
The Crafter Blue CB05 is the most popular aftermarket rubber strap for the Turtle. It is specifically molded to fit the cushion-shaped case.
What movement is in the SRP777?
The SRP777 uses the Seiko 4R36 automatic movement, which offers hand-winding and hacking (second hand stops when crown is pulled).