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This is a generic steel crown and tube set designed for the IWC Pilot Chronograph references IW3777 and IW3778. The crown measures 7.3mm in diameter, 3.0mm in thickness, and 4.3mm overall height. The matching tube measures 3.0mm (outer diameter) × 2.95mm (inner diameter) with a length of 6.0mm. Made of stainless steel, it serves as a direct replacement for a worn, stripped, or damaged original crown, restoring winding, time‑setting, and screw‑down water resistance functions.
Stainless Steel – Corrosion‑resistant, durable, polished finish matches the original.
Complete Set – Includes crown and matching tube – no separate purchase needed for proper sealing.
Screw‑Down Waterproof Design – Ensures water resistance when properly tightened, restoring factory sealing.
Precise Dimensions – 7.3mm diameter, 3.0mm thickness, 4.3mm overall height – exact fit for the 43mm pilot case.
Generic Aftermarket – Non‑original but manufactured to OEM specs for direct replacement.
| Parameter | Details |
|---|---|
| Compatible Models | IWC Pilot Chronograph IW3777, IW3778 (43mm case) |
| Type | Generic aftermarket |
| Material | Stainless steel |
| Crown Diameter | 7.3 mm |
| Crown Thickness | 3.0 mm |
| Crown Overall Height | 4.3 mm |
| Tube Outer Diameter | 3.0 mm |
| Tube Inner Diameter | 2.95 mm |
| Tube Length | 6.0 mm |
| Function | Winding, time setting, screw‑down water resistance |
IWC Pilot Chronograph IW3777, IW3778 (43mm steel case, e.g., IW377701, IW377709, IW377714).
Replacement of worn, stripped, tube‑damaged, or leaky original crowns.
Restoring winding, setting, and 60m water resistance.
1. Is this a genuine IWC crown?
No. It is a generic aftermarket replacement, not original, but matches the IW3777/3778 dimensions and includes the matching tube.
2. How do I know if it fits my watch?
Measure your original crown diameter (7.3mm) and thickness (3.0mm), and verify the tube length (6.0mm). Fits IW3777 and IW3778 references.
3. Will the original 60m water resistance be maintained after installation?
Proper installation with new gaskets can restore factory water resistance (60m). A water resistance test is advised.
4. What should I pay attention to during installation?
Press the tube into the case using a tube press or adhesive. Clean threads, apply silicone grease. Align the crown with the stem threads; avoid cross‑threading. Professional installation is recommended.
5. Is a sealing gasket included?
The crown typically includes one gasket. The tube base may require an additional gasket – purchase separately if needed.
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