
1919-20 Scott 47 30h red violet Perf 11 1/2 Type IV
"Hardcany at Prague"
Here is my copy of Scott 47 with 11 1/2 perf.

My 2011 Scott Classic Specialized catalogue states this stamp is usually found Perf 11 1/2, Perf 13 3/4, & Perf 13 3/4 X 11 1/2.
No special increased value for any of these above perforations.
Now a 30h "red violet" Perf 13 3/4 X 13 1/2 is 47b with catalogue value $175.
A 30h "deep violet" color with Perf 13 3/4 X 13 1/2 is Scott 47d with CV $190.
My Scott lists 47c as the 30h deep violet color (.20 cents).
Bottom Line: I see no evidence that Scott particularly values the perf 11 1/2 stamp at anything but minimum catalogue value.
I can't speak specifically to the Michel catalogue, but it would seem curious that one would have a minimum price, while the other would have hundreds of dollars for the same stamp.
