Looks like a rib flattening job, perhaps to get rid of heavy damage to the edges. The matting certainly fades w/the ribs concave form and (new) flats.
..and the xtra bead at the beginning of the bbl address is neat.

Screwed up screws, refinished wood, flattened rib, pad, no color, no blue & a 12ga.
Looks like a single trigger in the first pic,,but maybe I'm just not seeing it right. Ejectors are a plus of course.

Like Joe says,lots more info is needed.
But not knowing anything else about it, there's still too many things wrong already for the asking price,.