As mentioned in my recent post, I will be cycling through posting my B Dansco, A Dansco and slabbed toner Washington sets. Here is the A Dansco 1940 PDS set. The images are by Bob Campbell, and I think he did an excellent job.
Very nice and Bob does great work but I have a question... The reverse on all of these almost suggest some form of doubling at "Quarter" How does this happen? Not finding fault, just curious.
Sorry, I wish I could help you more with that question as I've often wondered about that myself. Unfortunately I don't know the answer.