CCM L 2258 A 0 90 - The FAQ's have a HIN decoder: viewtopic.php?f=18&t=1155
It's a 1990 boat, built in January of 1990 - the only year that I know of that the Formula boats were produced.
The only differences were the white powder-coated aluminum and the sails. Your jib was a later addition, as is the mainsail.
The model was only made for a short period, since the white paint chips badly and looks like crap (as you've noticed).
They've got a reputation for being heavy.
Guy I know had one that he named "Average White Boat" - after it weighed in at the 1996 Hobie 17 Continentals, it became known as the "Heavier-than-Average White Boat". It was a good 30-40 lbs heavier.
Otherwise, they are just like every other Hobie 17.