Sure, I'll play!
The J200-Jr was introduced in 1992, and it essentially took over the 16" jumbo design from the J-185, which preceded it for two years ('90-'91).
For comparison, here's a 1992 J-200Jr and a later J-185:
The Jr was built using the same long scale that the J-185 before it had, but they took the design aesthetic elements of the J-200 and used those -- some, but not all. So the Jr got the same inlays on the fingerboard, similar bridge (two pearl bars though). Same inlay pattern on the backstrip as on the J-200. Same tuners. NO binding on the fingerboard (and I love that about the Jr).
They also introduced a 12-string version of the J-200Jr, built on a short scale.
The Jr was dropped from the production lists in 1994, BUT occasional small batches or individual J-200Jr guitars were built in the period from 1995 to now.
Here's a pair of 2000 J-200Jrs (note that even in the same batch, two different pickguards were used on the same model -- that's Gibson!):
I've had three over the years, a 92 6-string, a 93 12-string and my current, a Custom Shop model from 2007:
This one has -- as yours will -- a red spruce top. It sounds great!!
One of the forum regulars has (or had) a bunch of these too, only with some in red, IIRC.
Let us know once you get your Custom J-200Junior!
Fred