reference number

Watch Reference Numbers: How to Read a Japanese Listing (2026)

How to read a watch reference number, tell it apart from the serial and caliber numbers, and verify it against a Japanese listing (品番, 型番) before buying from Japan.

2026.09.15

Buying from Japan

TAG Heuer Reference Numbers: Verify a Japanese Listing

A TAG Heuer reference number decodes collection, movement and case, but the serial number alone does not give a production year. Verify it before you pay.

2026.09.13

Buying from Japan

Panerai Reference Number Explained: How to Verify a Japanese Listing

A Panerai reference number (PAM code) names the model but is not engraved on the watch. This guide shows how to verify one against a Japanese listing.

2026.09.13

Buying from Japan

IWC Reference Number Explained: How to Verify a Japanese Listing

An IWC reference number (IW plus six digits) shows a watch configuration but cannot date or authenticate it. Verify it against a Japanese listing before you pay.

2026.09.13

Buying from Japan

Longines Reference Number Explained: How to Verify a Japanese Listing

Decode a Longines reference number position by position, verify it against a Japanese listing, and see what the archive service can and cannot confirm.

2026.09.12

Buying from Japan

Breitling Reference Number Explained: How to Verify a Japanese Listing

Decode a Breitling reference number position by position, then use it with the serial to verify a Japanese pre-owned listing before you pay.

2026.09.12

Buying from Japan