Buying Guides 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.
Buying Guides
Buying Guides Buying Guides Universal Geneve Reference Numbers: Verify a Japanese Listing (2026)
Universal Geneve has no official reference number key. This guide shows what actually dates a vintage Polerouter: serial ranges, caliber, and redial tells.
Buying Guides Hublot Reference Numbers: Verify a Japanese Listing (2026)
Decode Hublot reference numbers block by block — model family, case material, movement — and confirm a Japanese pre-owned listing matches what it claims.
Buying Guides Ulysse Nardin Reference Numbers: Verify a Japanese Listing (2026)
Ulysse Nardin reference numbers encode caliber, case, and dial, but there is no public serial lookup. How to read one and verify a Japanese listing in 2026.
Buying Guides Piaget Reference Numbers: Verify a Japanese Listing (2026)
How to read a Piaget reference number and serial number, decode vintage cal-code references, and verify a Japanese Piaget listing before you buy from abroad in 2026.
Buying Guides 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.
Buying Guides Patek Philippe Reference Numbers: Verify a Japanese Listing (2026)
Decode a Patek Philippe reference number from a Japanese listing: case-material letters, the /1 bracelet code, dials, and the papers to verify before buying in 2026.
Buying Guides Watch Service History: Verify It From a Japanese Listing (2026)
How to verify a watch service history from a Japanese listing: read the invoice, tell a service card from a warranty card, and spot swapped parts before you buy.
Buying Guides Zenith Reference Numbers: Verify a Japanese Listing (2026)
Decode Zenith reference numbers segment by segment, tie them to the El Primero movement, and check that a Japanese pre-owned listing is what it claims.
Buying Guides Omega Reference Number Explained: How to Verify a Japanese Listing
Omega reference number explained: how to read the 14-digit PIC, tell it from the serial, and sanity-check a Japanese pre-owned listing before buying from abroad.