John Arthure had experience of Atalanta sailing when the boats were quite new, and sent some details about A174 Cordyl in Bembridge boatyard. IoW:
” As you drive round the harbour, past the chandler, past SSJ ‘s office and the pilot house there in the corner on your left is an old, neglected, unloved Atlanta 26″.
I’ve uploaded a couple of John’s photos here and here. Sadly Cordyl is beyond restoration, but perhaps she has parts which are worth recovering.