Thinking back to the film probably more modern photos would be best. As suggested look at Roger Stollery’s slides and Sailing Club pics for these. Also see the Punch article on the front of the website.
Here are a few oldies that might be useful. Most of the likely candidates are in the articles to which I referred you. These are probably the best definition we have and some may be inadequate. We’d need Gareth and Jane to agree to these if you want to use them.