What is the IWC IW376063?
The IW376063 is an IWC Aquatimer chronograph, a self-winding dive watch with a steel case, a screw-down crown, and a rotating bezel. Aquatimer chronographs from this era are documented as using IWC calibre 79320, a Valjoux 7750 base that IWC reworked. Confirm the exact calibre and case specs for your reference through IWC or a watchmaker before you buy.
Reference numbers inside the Aquatimer family change with dial color, strap, and market. Two watches that look the same on a screen can carry different references and different values.
Why replica IW376063 listings fail on the basics
A replica can copy a dial print and a case shape. It cannot copy the parts that matter when you wear the watch.
- Movement: A copied case hides a stock movement with no IWC service history and no parts support.
- Water resistance: A dive rating comes from gaskets, case tolerances, and pressure testing. A seller's "300 m" claim means nothing without a test report.
- Case finishing: Genuine Aquatimer cases have sharp lug bevels, correct brushing direction, and engraved reference numbers.
- Service: IWC and independent watchmakers service genuine movements. They hold no parts for a counterfeit.
- Resale: Counterfeit watches have no legal resale market, and no insurer will cover them.
- Legal risk: Importing counterfeit goods into the US is prohibited. Shipments can be seized and destroyed.
What the reference number tells you
An IWC reference number points to one build sheet: case metal, dial variant, strap, and movement. Dealers, auction houses, and service centers all use it as the starting point for a check. If a seller cannot state the reference and serial, stop there.
- The reference sits on the caseback, along with the serial on most IWC models.
- Dial variants within one reference can look near-identical in photos and differ in value.
- Restored or swapped parts break the link between the number and the build sheet.
How to check an IW376063 before you pay
- Ask for the reference and serial numbers in writing, plus clear photos of the caseback.
- Request movement photos. Dial shots alone tell you little about what sits inside.
- Match the numbers against IWC records, a service invoice, or the original warranty card.
- Check the full set: box, papers, and service receipts with matching numbers.
- Have a watchmaker open the case and pressure test it before the deal closes.
- Compare dial details against photos of the same reference. Lume plots, date font, and print weight shift between production runs, so a different Aquatimer is a weak comparison.
What should you do instead?
Buy through channels that can prove ownership and history. IWC boutiques and authorized dealers cover current models; established pre-owned dealers, auction houses, and collector forums cover older references.
Prices for an IW376063 track condition, the box and papers, and how recent the last service was. Check completed auction results and dealer listings for the same reference before you make an offer. No fixed price guide stays accurate for long.
If the watch needs work, IWC's service network handles older Aquatimer chronographs. Parts for discontinued references can take weeks to source, so plan for a wait.
Frequently asked questions
Is a replica IW376063 waterproof?
Do not assume it. Water resistance depends on the case, the gaskets, and a pressure test. Counterfeit cases are not built or tested to a dive standard, so a leaked case can ruin the movement on the first swim.
Can customs seize a replica watch?
Yes. In the United States, Customs and Border Protection can seize and destroy counterfeit goods at import, and the buyer can face penalties. The same rule applies to most countries with trademark enforcement.
Does IWC still service the IW376063?
IWC runs a service network that covers many older references, including Aquatimer chronographs. Ask for a written estimate and turnaround time first, since discontinued parts can add weeks.
What is the difference between a replica and a homage?
A homage borrows a general style but carries its own brand name and its own logo. A replica copies the trademarked brand, the logo, and the reference number, which makes it a counterfeit product.
How much should an IW376063 cost?
There is no single number. Condition, completeness, and service history move the price by a wide margin, so compare live listings and recent auction results for the exact reference rather than a generic guide.