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Seiko SSA347 (Presage) Specifications
| Reference | SSA347, SSA347J1 |
|---|---|
| Case Size | 40.5mm |
| Lug Width | 20mm |
| Lug-to-Lug | 47.6mm |
| Thickness | 11.8mm |
| Case Material | stainless steel |
| Crystal | Hardlex |
| Water Resistance | 50m |
| Movement | 4R39 (automatic) |
| Bezel | fixed smooth |
| Crown | push-pull |
| Case Back | exhibition (see-through) |
| Price Range | $350-$450 |
Compatible Straps for the Seiko SSA347 (Presage)
The SSA347 (Presage) uses a 20mm Lug Width and is compatible with the following strap types.
| Type | Recommended Brand | Why It Works | Price Range | Link |
|---|---|---|---|---|
| leather | Barton | Dresses up the watch, fits 20mm lugs | $15–$80 | |
| mesh | Hirsch | Adjustable fit, dressy appearance | $15–$80 | |
| NATO/ZULU | Fluco | Classic look, easy to swap, fits 20mm lugs | $15–$80 | |
| perlon | Crown & Buckle | Lightweight, breathable, adjustable fit | $15–$80 |
Replacement Parts for the Seiko SSA347 (Presage)
| Part | Description | Compatibility Note |
|---|---|---|
| crystal (Hardlex or sapphire upgrade) | Protective cover over the dial | Fits 40.5mm case |
| crown with stem | Time-setting knob on case side | push-pull type |
| spring bars | Pins that hold the strap to the case | 20mm, 1.5mm diameter recommended |
| case back gasket | Seal that maintains water resistance | Required for 50m WR rating |
Modding the Seiko SSA347 (Presage)
The SSA347 (Presage) is a popular platform for modding. Here are the most common modifications.
- crystal upgrade to sapphire — Upgrade the stock mineral/Hardlex crystal to a scratch-resistant sapphire crystal.
- strap swap — Upgrade to a premium aftermarket strap or metal bracelet.
Frequently Asked Questions
What lug width is the Seiko SSA347?
The Seiko SSA347 Presage has a 20mm lug width.
What movement does the SSA347 use?
The SSA347 uses the Seiko 4R39 automatic movement with an open-heart complication showing the balance wheel.
Can I put a bracelet on the SSA347?
Yes, a 20mm mesh or oyster-style bracelet will fit. However, the dressy design pairs best with leather or mesh straps.