there was some cross over of hull#s for which year, (For ex: #101 was a '72, but #173 was a '71) but I dont recall the details of why that occurred. Pearson Serial Number Decoding
Ive seen '73s from #331 to #497. I had seen #234 as a '72 named "ViewPoint" in the New England PHRF valid list - dont recall from where I got the year data, however, possibly the old sailnet list.
its pretty much anecdotal, however, she is what she is now.
mine is #393 and is a 1973.