I have a visit to The Loch planned next week and just read a great article in Trout and Salmon on the history of the Invicta and the many variants.
Interesting to read that Stan Headley had success last year with a Silver Invicta with the traditional wing replaced with a brown partridge hackle.......I had all the bits so made my interpretation.
Will give this a go on a sinking line next week,
Steven