The seller is a member of this community. I have purchased from them before and was satisfied. I was concerned because the listing image was so poor but when quite happy when the stamp arrived. The listing image did absolutely no justice for the nice stamp I received.
All that said and to my hobbyist eye, this is a re-perf. Given the poor image quality, I won't hazard a guess on the gum.
Don
Edit:
Here is the listing image with the left hand perfs being copied and aligned against the right hand perfs. Pretty obvious.

Also notice that distance from the bottom of the perf to the edge of the design as shown here. Again, pretty obvious.
