Hi Gilly,
I am not the expert on restoration, but there are a few about and I am sure they'll be on here sooner or later. Its hard to tell what design it is from the photo's - a good transom shot is often a giveaway, certainly could be 2501, if it is I'd date it around 1975; I had 2521 in 1976/7 so somewhere around there. The bow does look a nit Jennifer Julian to me, but I am not sure there were any wooden ones ... sure others can add to this ...