Depending on who you talk to it is an R.4-R.5. The common O-115 was retooled and then some more half dollars were struck. It is an easy coin to spot as the 115a has almost no denticles and softness on the reverse lettering. Very, very few above VF. This won't be a top pop but be in top 5% for sure. I wanted $350 but will go hear offers.