Does kind of look like a combtail, and I would definitely not classify it as your typical crowntail :). Age is hard to say..... the way I do it is by looking at the length of the pectoral fins. I can't really get a good look at them from the picture. Most fish are sold between 4 to 6 months, but depending on where you got it from, where it was bred originally, and how long he was waiting on the shelf, he could be older or younger. If his body (not counting fins) is longer than in inch and a half, I would say he is older than 6 months. he looks to be about 5ish months to me, but I am by far no expert so you might want to have a few breeders age him for you.
He is really cute :) Does he have a name yet? I can't remember if you mentioned one. Also, what kind of set-up do you have him in?