Though the "well-used" Rebel gear looks kinda out of place, as do the assorted Reb fighters (such as the X-Wing "landed" on top of the gaping elevator shaft). That said, though, you could probably make a case for it being a post-Endor ISD (or SSD), or possibly even the Errant Venture herself.
What it really needs are some TIEs hanging from the ceiling racks.
"Party." --High Priest Harrar