reference numbers

Bell & Ross Reference Numbers: Verify a Japanese Listing (2026)

Bell and Ross publishes no reference number key. This guide decodes the collection, complication, and color blocks and shows how to verify a Japanese listing.

2026.11.05

Reference Numbers

Jacob & Co. Reference Numbers: Verify a Japanese Listing (2026)

Jacob and Co publishes no reference number key. One part of the model number is decodable, and this guide shows how to verify a Japanese listing with it.

2026.10.29

Reference Numbers

Montblanc Reference Numbers: Verify a Japanese Listing (2026)

Montblanc has no public reference-number decoder. Here is what the 6-digit catalog number, the caliber code, and the serial actually prove before you buy from Japan.

2026.10.21

Buying from Japan

Credor Reference Numbers: What a Japanese Listing Shows (2026)

Credor has no public reference-number key. Verify a Japanese Credor listing with Seiko model lookup, caliber dating, and collection checks.

2026.10.12

Reference Numbers

King Seiko Reference Numbers: Vintage Japanese Listing Guide (2026)

Decode vintage King Seiko reference numbers by generation (1961-1975): 44KS, 45KS, 56KS, 52KS, factory, caliber, and how to verify a Japanese listing.

2026.10.09

Buying Guides

Chronoswiss Reference Numbers: Verify a Japanese Listing (2026)

How to read a Chronoswiss reference number (CH-xxxx-xx): the collection, case material, and dial-color code, so you can check a Japanese listing before you buy.

2026.10.04

Reference Guides

H. Moser & Cie Reference Numbers: Verify a Japanese Listing (2026)

H. Moser reference numbers run XXXX-YYYY, and the first digit is the collection. Decode an H. Moser serial number question and verify a Japanese listing remotely.

2026.10.01

Buying Guide

Breguet Reference Numbers: Verify a Japanese Listing (2026)

Read a Breguet reference number: what the metal codes (BA, BB, BR, PT, TI) mean, where the serial and secret signature sit, and how to verify a Japanese listing.

2026.09.30

Buying Guide

Girard-Perregaux Reference Numbers: Verify a Japanese Listing (2026)

A Girard-Perregaux reference number encodes the model, case material and dial. How to read the caseback and verify a Girard-Perregaux from a Japanese listing, 2026.

2026.09.29

Buying Guide

Vacheron Constantin Reference Numbers: Verify a Japanese Listing 2026

Read a Vacheron Constantin reference number and serial number from a Japanese listing: metal codes, engraving locations, and why serial dating is only approximate.

2026.09.29

Buying Guides