Here is a great link with background on the distribution of the 1939 "Premiums" including R303 variations and V351s. The R303-Bs were actually sold for a penny each. The V351s were received in exchange for WWG wrappers. Unclear how the R303-As were distributed.
http://www.1939baseball.com/baseball_cards.html
Here's a pile of V351s....
Unknown.jpg