I had to look up what an 'APH' dial was, another fetish of the Rolex boys, it seems. Your's could be, but does it really matter? It's not something I'd spend more than two seconds thinking about.
Anybody feel like clueing in the hoi polloi?
I had to look it up:
“a small spacing error in the word
'Cosmogr aph', and only appearing in a small serial range, these have become highly sought after by the Rolex collector community”