That serial number belongs to a 2021 Gibson SG Junior, manufactured at the main Gibson USA factory in Nashville, Tennessee.

About the Guitar

The SG Junior from this era is part of Gibson's "Original Collection." It is a beautifully minimalist rock machine featuring a solid mahogany body and neck, a vintage-style wrap-around tailpiece, and a single, dog-ear P-90 pickup in the bridge position

Yes, it is essentially a reissue, though the exact terminology depends on whether you look at the marketing catalog or the Custom Shop.

That specific guitar belongs to the Gibson USA Original Collection (the standard production line, not the $4,000 Custom Shop historic line). When Gibson launched this series around 2019, they deliberately designed the standard SG Junior to be a faithful, period-correct reproduction of the 1961 vintage specifications.

Gibson specifically built it with the early '60s neck joint, sharp vintage body beveling, a Gibson "SlimTaper" neck profile, and a vintage-style compensated wraparound tailpiece. So, while it isn't an ultra-premium Custom Shop "Historic Reissue," it is a production-line vintage reissue in everything but name.

That 5.9 lb Weight is Fantastic

At 5.9 lbs (5 lbs 14 oz), your guitar is an absolute featherweight—even for an SG. Because SGs have thin mahogany bodies and no heavy hardware (no neck pickup, no heavy zinc tailpiece, no toggle switches), they run light. Standard production SGs usually land anywhere between 6.2 and 7.2 lbs.

Getting one under 6 pounds is rare and highly desirable. It means the mahogany blank used for that body was exceptionally resonant and low-density. It’s a huge plus for comfort, though you might notice a tiny bit of "neck dive" when using a slippery strap because the body is so incredibly light compared to the neck.

THERE IS A TINY PIN SIZED FLAW AND TWO SMALL CIRCULAR FLAWS. YOU’D HARDLY NOTICE UNLESS YOU REALLY LOOK FOR THEM. OTHER THAN THAT IT IS MINT AS MINT CAN BE…..

THE CASE IS FLAWLESS. OPENS AMD SHUTS LIKE BRAND NEW. Really :)