I'm guessing early 1980s for this one, too. If you want to know more, please post pictures of 1) the IYRU plaque, 2) the transom, and 3) the aft half of the centreboard case. Parker changed the design of those areas several times between 1978 and '86, so seeing them should help pinpoint the building date within a few years.Parker #950 sail K-628