I havee an Ideale I took off an old bike many years ago and can't remember just when. It's brown leather with a total of 7 copper rivets each stamped Ideale. Leather is stamped Speciale Competition, 90, TB. The chrome nose is stamped Ideale TB Bte S.G.D.G. What vintage would this be and is it fairly common ? Thanks. John Burdett, Alberta Canada.