He wouldn't go for "pure value investing" even when he started. He started first with all sorts of arbitrage plays, and later on he put together a partnership where he used his investor's capital to acquire a controling stake in companies and then sell them off (what nowadays is called an activist investor, like Bill Ackman).

The folksy pure value investor that we know today didn't appear until much later, in the mid 1970s. To be fair though, this is what made him the most money.

He wouldn’t change a thing. He hasn’t changed his overall strategy an iota since buying Sees Candy in the early seventies.