Ovation serial number dating
If you see a seven digit serial number on the back of a Dean guitar, you can be sure that it was produced in United States.
A number, usually 5 to 7 digits long, follows the letter and helps to further identify the year. Made in Korea Serials (may or may not have letter prefix.
If you feel a certain company should be included, please request it and feel free to share any dating info along with your source. Dean Every Dean guitar made in United States comes with a seven digit serial number that is printed on the back of the headstock (some 90s models may be stamped on the fretboard).
First two numbers in the sequence will tell you when your guitar was produced.
Adamas introduced in prototype form for artists and select dealers.
The first 26 are prototypes; #27-#61 are a non-tooling production run; #62-#76 have a new headstock design and the Kaman bar neck reinforcement.
The innovation is the use of a thinner, synthetic back, because of its foreseen acoustic properties.