A banknote issued by the Việt Minh for circulation in the southern regions of Vietnam (Nam Bộ) which at the time weren't largely controlled by the Communists. 
P-32 D-69 50 Dong 1950.
The Việt Minh.
<a rel="nofollow" class="external text" href="http://art-hanoi.com/collection/vnpaper/p32.html">Nam Bo 50 Dong 1950</a> (Art-Hanoi).