gravesbass wrote:
That stain on the back of the neck looks like thumb sweat staining. Maybe the owner played a lot in the low registry and sweat/wear rubbed under the satin clear coat. I had an old 78 P bass that had this all over the neck.
It's hard to tell at this resolution, but it almost looks as if the skunk stripe shrunk and left a small gap near the headstock. Maybe some air got underneath the finish through the truss rod slot. I have a USA Telecaster guitar from 2000 that has something similar. The lacquer on the skunk stripe is separating in several places. On the dot inlays as well (black dots, lacquered-over with clear coat).