Hi Mel, This cab is 2 inches wider and 3 inches deeper then my 200s cab.
It may have been intended for a 200s, I don't think it's for a 2000s because
that head hangs over the edge 2 inches on each side. It's loaded with Sunn
1516 Magnas if I remember correctly.
I'm don't claim to know everthing regarding Sunn gear, but I have no knowledge of a
conventional Sunn ported 2x15 with those dimensions. I really don't have any experience with them, but I
think the 215SH
folded horn was about those dimensions.
However that is pretty obviously a non conventionally ported 2x15. On the exterior it looks like it's
just a port, the drivers themselves aren't really visible.
Is
that the cab in question?
The 42" high ported cabs (with casters) measure 24" wide and 15" deep. To my knowledge, there are three vintage ported 2x15 Cabs with those dimensions.
200S; horizontal port running the width of the cab between the drivers.
Sorado; two circular ports in the middle towards the outside.
215S; vertical divided port running the entire baffle to the right of the drivers.
The 200S and Sorado cabs came with the corresponding head, and the 215S was "ala carte". If it is the 215SH, it was also available without a specified amp. As Mel stated, the 2000S cabs were 48" tall;
and 30" wide to match the width of the 2000S amp.
I don't know much the later Sunn/Fender cabs. If it's one on
them, I'm of zero help!