by Roger » Fri Jun 23, 2006 6:55 pm
If it was manufactured in Fall River, then it had to be made by Oday Corp according to my information. It is also definately a DS II. If it was a DS I the transom would be decked; if it was a DS III the transom would be higher. Oday built the DS II starting in 1971 and stopped production in 1986. In 1971 the sail numbers started with 4522, so your 4685 as a class number would support your speculation that it is a circa 1972 model.
HIN's were not required prior to November 1, 1972 so if you do not have a HIN that looks like XDYD4685 followed immediately by a 4 digit number line 0972 (indicating month and year of manufactur), then it was likely a 1971 or (prior to) November 1972 model.
The fact that you state that your HIN is 25881 leads me to believe that it was prior to November 1, 1972, but the class number could be late 71 or early 72.