Which Fritillary is This?

I think it might be a pearl bordered fritillary, I find them very difficult to identify. Apparently there are 29 species of fritillary in Switzerland and 19 of those are in our area. Guy Padfield's wonderful book called the butterflies of Villars-Gryon, is great for anyone in the Alps, especially in our area of course. I wish I could get a photograph of Guy, he is a wonderful eccentric. For a year we shared a chalet with him occupying the studio on the side. Every now and again he would leap out the window and run down the field in front of us waving his butterfly net. Sadly he has had to go back to England to look after his aging father. A good man.