It looks like an A Class to me.
They are formula based so they can vary quite a bit in size....
For those of us a bit more metric:
Length = 65 inches = 1651 mm
Beam = 13.5 inches = 343 mm
Mast height = 84 inches = 2159mm
Waterline = 49 inches = 1245
I am guessing it should weigh 12 to 15 kg (26 to 33 pounds) in sailing trim
More guidance on measurement of an A Class here:
http://www.radiosailing.org.au/2013arya/index.php/home/2012-05-15-15-38-41For comparison, my A Class (Sidewinder) weighs 15.1 kg, mast is 2040mm tall, waterline length 1300mm, foot of mainsail 490mm, foot of jib 515mm, height of fore triangle 1600mm
Measurement form for my boat is attached. The formula should calculate as close to 1000 as possible.