Gorgeous boats. Designed as an Oly class in 1929. Narrow beam, low-slung, wet, and a double handful of hell downwind. They'll punch thru surprisingly nasty seas. Lots of strings, awesome bruises, and a devoted following of hardcore sailors.
Home page for Int'l Dragon class HERE
. The Dragon gets my blood up! Heh -- we bought a blown out old spinnaker for our SJ21 from Minney's, just to practise with. It's off a Dragon, North American Champion's boat apparently. You can see the Olympic cut to the spi in the website photos, and the difficulty keeping the bottom open on such a narrow boat. Makes for some exciting runs!
Edit: didn't become an Olympic boat til 1948. Frolic's right -- it is of the Meter Boat kin, tho the overhangs are less ridiculous. Here's some Int'l 6-Metres: