Looks like a jap. toy. The picture displayed seems to have 2 different leves of sharpness. The trees look like a scanned photo but the "ufo" is to crisp to have been in the same photo. It's not a difference in D.O.F. because the trees are in focus just not as sharp as the ship
I used to work at the post office and have run by quite a few letters with chage taped as postage. I would take it and replace it with a stamp. The bottom right was torn because of the machine it was fed through, the extra weight probably snaged something. Postal employees are alowed tips, people on ocasion would leave small amounts in their box or cookies around the holiday time, it is a very nice and apreciated gesture. Alot of work goes into getting mail out everyday and any sign of apreciation is always well apreciated.