Thanks for all the responses. It looks like my 22 was definitely made before Nov., '72. And if one responder is correct, mine is the 3,124th boat made by O'Day and the 132cnd 22 made. Anyone have a Class # lower than 132?Some other signs of age are the number of handholds in the hand rails (mine have 5 but if you order one from Rudy you get 6), the slope at the stern (see photo), the main sheet configuration (mine does not attach to the backstay but rather to both ends of the transom and a double block on the end of the boom). Anything else?I'm still stumped about my hull color. I'm sure it has never been painted but I've never seen the light blue on another O'Day. Anyone know how many color options O'Day offered? I know, call Rudy.