A few years ago late Dr. Roger Schnell had challenged me to find him a WWII period Clipper cover from Bulgaria to US. I realize that there collectors hunting for Bulgaria to US clipper covers are just as scarce as the covers in question, but that's a totally different story. All payments must be received within 14 days from the end of the listing. Get images that make Supersized seem small.Tailor your auctions with Auctiva's. The item "WWII Airmail Bulgaria to US via Germany, 1941 very elusive" is in sale since Wednesday, January 2, 2019. This item is in the category "Stamps\Europe\Germany & Colonies". The seller is "collectora" and is located in North Palm Beach, Florida. This item can be shipped worldwide.