1986?
That's my guess. In 1986 the Hunter Legend 35 had a walk through transom.Except the Hunter 54 that was introduced in 1981 (is that right?) had a walk thru transom, but you said midsized.Opinions on this feature. Makes a nice spot to get on and off the boat particularly from the water or dinghy. Makes installing a windvane a little more difficult. Makes having dinghy davits a real trade off. Combined with a reverse transom you lose interior volume and cockpit space. You could "potentially" get a lot of water in the cockpit from a breaking wave. The water will drain out REALLY fast afterwards though. In the end I don't think it is a good or bad, just different. I've had both and wouldn't choose a boat because it had that feature or not.