It's hard to tell what this is - a 250Osprey ('cept they didn't make one in 87)? A 271 Osprey? Around this time AS made some "one-of"s. They made a 280/281 Osprey in '88/89 but that thing was a beast. They also made a 270 Osprey.
It could be a 280... Doesn't quite look the profile though. Notice the beam - 9' 7.5"


It's not an XF - here is what one of them look like

My '71 liner was only attached at the top by the rub rail screws, it stops just short of the cap. At the bottom it's a continuous part of the deck/glassed.
Just a small 1/4" at most gap between the liner and hull side. Seems they had a mold for the liner and deck when constructed.

You might look under the rub rail on the port side toward the aft.

I have a 1986 Osprey 200. I tried to sell it and realized that the serial number on the top Starboard side of the transom is not legible. Is there another location that has that number? I can't sell it like it is. Any help would be appreciated.