1951 rookie Kubala Castellblanch card advertising competition ending March 52, earliest Kubala?



1951 the Barcelona rookie card of Kubala, by Castellblanch - this card is sized around about large gum card to  small postcard dimensions. It advertises a competition ending on 17th March 1952 in which a new, 1951-dated motorcycle could be won. The earliest Kubala Barcelona card? Note: there were later issues by this firm. This is the earliest one of the Kubalas.