Gibson J-50
The J-50 shared the same basic specification as the J-45, but had a natural finish instead of the latter’s normal sunburst one.
It was officially introduced in 1947, but may have been available from 1942. Initially priced at $100 ($10 more than a J-45).
The J-50 enjoyed a wide appeal, especially among folk, country and blues players. One of the first major names to be associated with it was Tammy Wynette, who is said to have chosen it because it’s tone matched her singing style. Former Martin user, Bob Dylan, bought one in the early 60’s, and used it on his debut album released in 1962.