Albert B Sabin SIGNED Doctors Mayo First Day Of Issue Cover 1964 Oral Polio Vacc For Sale

Offered is an Albert B Sabin SIGNED Doctors Mayo 1964 First Day Of Issue Cover (FDC) cachet. Albert Sabin was a medical researcher known for developing the oral polio vaccine which played a key role in nearly eradicating the disease. Signature and envelope are in excellent condition. Signature in black ink. Envelope has four sharp corners, no creases. Listed as “Used” as this signed item was previously owned. This Sabin signature was purchased, along with many other signed items (including FDC’s) at an estate sale of a long time memorabilia collector/dealer. Although there is no COA with this item this signature appears authentic compared to similar Sabin signatures. I have also been a memorabilia collector for more than 50 years. Always a money back guarantee if not completely satisfied provided the signed item is returned exactly as received. Check my 100% response and buy with confidence. Ships via USPS with tracking and delivery confirmation. State sales tax may be added depending on state where buyer resides. Thanks for looking.