Hi Green long time no hear!The Davis DX-1 Starship Alpha?
I guess, my proposal of the Davidson Gyropter is good enough to go on with the next mystery.
Thanks very much Robert you're a scholar and a gentleman!Carlo, the S.62 was license built in Russia as MBR-4.
Have a look here:
http://авиару.рф/aviamuseum/aviatsi...vaya-letayushhaya-lodka-s-62-mbr-4/?attempt=1