I believe the first and fifth number answer your question 9 and 0, a 1990.
You can see the serial number on a Gibson, on the inside of the guitar.
1953 www.jedistar.com
To determine the age of a Gibson J-50 guitar, you'll need to look at its serial number, which is typically located inside the body of the guitar. Gibson's serial numbers can provide information about the year of manufacture, as they often include the year as part of the sequence. Generally, for guitars produced after 1989, the first digit of the serial number indicates the year. You can also consult Gibson's official resources or databases for more specific information related to your guitar's serial number.
1964
A Gibson's serial number is on the back of the headstock.
Take it to a Guitar Shop or Post the serial#
The Gibson SG was Gibson's first solid body guitar and was infact originally called the Gibson Les Paul. Later Gibson made was is now refered to as the Les Paul and the original was renamed the Gibson SG. SG stands for "Solid Guitar" because it was their first solid body guitar.
well the serial number isn't there that you've got so my advice send Gibson an email and see what they say. They respond very quickly.
I got this off the Gibson web site. In 1977, Gibson introduced the serialization method that we primarily use to this day at Gibson USA, Gibson Acoustic, and the Gibson Custom facility in Memphis, TN. The serial number will be an 8 digit number impressed into the back of the headstock with "MADE IN USA" below. The pattern is as follows: YDDDYRRR YY is the production year DDD is the day of the year This would indicate your guitar was built in 1981
If the guitar is a guipar from GUITARAS DE PARACHO, it will not have a serial number. Each one is uniquely hand made in Paracho, Michoacan, Mexico.
It is from the year 1592 and is worth $26 and 35 cents
of course it's worth it's price . but the scratched serial will degrate it's value a little.