Mark - per the description - I'm pretty sure they will fit 1970 and earlier with flat spring gear but no idea about later models. The backing plate shape is not pictured because I don't have any to photograph.
Brian - I had considered that but I've never used them; the new gear I fitted will no longer take them and I won 18lbs usable on the legal weight by taking them off permanently. They are just gathering dust and should be turned into Avgas.
