NC. 33 Shares, I/U stock certificate, black on brown border, eagle vignette, Class "A" certificate. XF condition. The Bensen Aircraft Corporation was established by Dr. Igor Bensen at Raleigh-Durham International Airport in North Carolina in 1952 to develop and market a variety of helicopters and autogyros of Bensen's own design. The most successful product was the Bensen B-8 that first flew in 1955 and remained in production until the company closed down in 1987. The stock is signed by Bensen as President.