I have been going though my grandfathers collection and identifying stamps, but this one is giving me a little trouble. In person it looks blue green but after hours of looking at it I am not so sure what it looks like. The stamp appears to have been hinged or glued, and the gum is either worn away or non existent ( I can't tell). I think the paper is soft porous but I am still getting used to different paper types. I would love to find out that someone took this out of a collection (scott 169 or 194) and used it but I think it might just be a scott 184. I look forward to reading any insight.