Small, slightly irregular holes:
Type I horizontal.
Type I vertical as if it was 13.5, which it isn't.
Type I vertical measured correctly, looks like 13.1, and not 13.
Type II horizontal
Type II vertical
Medium, regular holes:
Type II horizontal
Type II vertical
After these measurements, I now realize why I am unable to separate the two vertical perforations with the naked eye:
1. The 13 perforation is from the irregular grid with small holes, and the measurement is not exactly 13.5 or 13.
2. The difference between 13.1 and 13.4 is VERY small.
I wonder if the other stamps from the first batch (October 1, 1935) are also found with the 'almost 13' vertical perforation?
