Looks like
Die Deterioration Doubling to me. The Mint ran the dies hard in the 1950s and 1960s. It's quite uncommon to have doubled dies on both the obverse and reverse of a coin. Also, that doubling doesn't look like any known die varieties for 1960.
The obverse might be
Machine Doubling, but given that it appears in all directions radiating outward, I think
DDD is a better bet.