When I was a post office the other day they had a display of SE stamps. One caught my eye. There is a famous "mistake" stamp from long ago. It was of an very early plane and the plane was printed upside down. To this day, if memory serves, this is a very rare stamp and VERY valuable. This is also one of the SE reissues and it includes the upside down mistake. I am wondering if this reissue will effect the value of the original and rare stamp? I'm thinking not. This is, in essence, a reproduction of the original. What do you think?