The hair definite grease filled, early 90's notorious for these, even see it on the weakened TRUST (polished dies)
The weak obverse is also a
Grease Filled Die, causes weak appearances
The 1978 is indeed a MAD, misaligned die, see how at 5 o'clock (in front of coat) 180 degrees out how rim is thinner, strike wasn't strong enough to press the edge towards the collar and fill in the preformed planchet edge.
None of these are mint "errors", just what happens in the machining process.
Edited by Crazyb0
03/18/2017 11:08 pm