trout 1105, there is definately a " fatter " version of the 1993 50c, as mentioned in my post 4.8.2016. I have few of these in brand new Ch UNC condition which clearly have a thicker date. I've been collecting for 40 + years.
Mine were taken out of circulation as soon as they were released, so the few that I have are brand new.
Can't say the same about the 1985 50c when they were released - complete rubbish coins with varying amounts of pock marks, very poor finish on just about all of them. Could never get even just an aEF one.