Quote:
... I do my best to check for that I didnt find any trace for grill ...
Mottaz, I want to go back to this portion of your early replies to this thread. What methods did you try? Strong side-lighting from several angles? Dipping in watermark fluid? Trusting a note written by another collector? Other?
Second, What are you using to identify your US stamps? Which websites or which printed catalogs (publisher and year)?