Where to Find the Serial Number on a Alvarez & Alvarez-Yairi Guitar
For handcrafted Japanese Alvarez-Yairi models, look straight inside the soundhole towards the neck joint. A 2-digit or 4-digit code is stamped directly into the wood block.
Standard Artist, Masterworks, and Regent series have a printed label affixed to the back wood inside the soundhole with model and serial numbers.
Certain vintage export and electric models carry serial numbers stamped on the back of the headstock or neck plate.
Alvarez & Alvarez-Yairi Serial Number Formats & Historical Dating Cheat-Sheet
| Production Era | Serial Format | Decoding Rule / Meaning | Example |
|---|---|---|---|
| Yairi Shōwa Era (1975–1989) | 2-digit number (e.g. 50, 58) | Kazuo Yairi used the Japanese imperial calendar. Add 1925 to the stamped number to determine the exact year. | Stamp 50 -> 50 + 1925 = 1975 |
| Yairi Heisei Era (1989–2019) | 2-digit number (e.g. 05, 12, 26) | Add 1988 to the stamped Heisei number to get the western year. | Stamp 12 -> 12 + 1988 = 2000 |
| Yairi 4-Digit Stamps | YYMM (e.g. 5204) | First two digits decode the Emperor year, last two digits represent the manufacturing month (01-12). | 5204 -> Year 1977, April |
| Modern Production (2000–Present) | YYXXXXX or Factory prefix + YY | First two digits of the 7-10 digit label serial designate the production year. | 1905421 -> Made in 2019 |
Frequently Asked Questions: Dating & Authenticating Alvarez & Alvarez-Yairi
Where is the serial number on an Alvarez-Yairi guitar?
Unlike regular acoustics where serials are on the paper label, authentic Alvarez-Yairi guitars have their primary date code stamped directly into the wooden neck heel block inside the body.
How do you tell if an Alvarez is made in Japan?
True Made-in-Japan Alvarez guitars bear the "Alvarez Yairi" logo on the headstock and are signed/stamped by Kazuo Yairi or the Yairi workshop in Kani, Gifu, Japan.
What do Alvarez model numbers like AD60 or MD70 mean?
The first letter is the series (A=Artist, M=Masterworks), second is body shape (D=Dreadnought, F=Folk, G=Grand Auditorium), and numbers reflect tonewoods (60=Sitka/Mahogany, 70=Sitka/Rosewood).
Explore Alvarez & Alvarez-Yairi Market Prices & Buying Advice
Knowing your guitar's build year is the first step in determining its resale value. Read our comprehensive 2026 buying guide and valuation tables to see current market trends for Alvarez & Alvarez-Yairi.