This Scott #17 or #36 has an APS Expert Committee Report on it but still there indecisive on what this is,used,genuine,cut frames on all four sides,margins to narrow to positively identify either way.
So just to make a point most of the Scott #36 I have seen do have the perforations cutting into the frame on any one side and there not well centered (though I haven't seen one that is,this doesn't mean there could be some examples around),but this #17/#36 doesn't show perf cuts in the frame which tend to show that this could be a #17.
I'll post both photos of the #17/#36 and a #36 with it for comparison.



hope the photo's are clear enough as I'm not to steady with a camera these days