Serial number dating / Westone
Westone serial number lookup
Find the year a Westone was built, read from Westone’s own numbering scheme.
Can't read a digit? Type ? in its place. Looked-up serials are kept, never tied to you. How it works
Type the serial or code from the instrument. We read it as you type.
Cross-check with a pot code
The number stamped on a potentiometer inside the guitar. It dates the part, not the whole instrument.
Example Westone serials and how they read
Made-up serials in each of Westone’s formats, read by the dater above.
| Serial | Reads as | Format |
|---|---|---|
| 6123456 | 1986 | Seven-digit (first digit = year), Japan |
| 108123 | Aug 1981 | Six-digit (first digit = year, to mid-1981), Japan |
| 87101234 | Oct 1987 | YYMM + production number (late 1987 on), Japan |
How Westone serials date
- Letter-month + year (early 1980s)
- YYMM + production number (late 1987 on)
- Seven-digit (first digit = year)
- Six-digit (first digit = year, to mid-1981)
- Five-digit (year + unexplained + month)
More on Westone serial numbers
How sure is it
Every result carries its confidence. Treat the year as a strong guide, not proof: a serial can be replaced, a neck and body can be from different years, and reissues copy old numbering. For anything that matters, confirm the year against the neck date, the pot codes.
Other brands
This is one of many brands the serial number dater covers.