This is a photograph of Scott 5655 on an envelope. I purchased this stamp, placed it on an envelope, and was preparing to mail it when I realized something was unusual.
There is a series of vertical ridges on the left side of the stamp, between the serpentine die cut and the actual stamp image. What is this distinct series of vertical ridges? Have other people spotted such stamps?
- purchased from USPS Philatelic Fulfillment
- USPS item # 750703
- purchased as a strip of 25 from a coil of 3000
- this stamp was positioned one (1) left of the plate number