Rare luck. This mouthpiece was available brand new in 2012 from a dealer in France, but might have been made circa 1960;- in the "Old Design" Couesnon mouthpiece style that closely matches the original Couesnon / Kalashen mouthpiece in profile. It has a broader rim design than the original and a smaller diameter but still retains the deep conical cup and period correct appearance. It appears that Couesnon was making replicas of its early mouthpieces. Our best guess on the date of the Kalashen comparing to contemporary Cousenon engraved models like it places it circa 1910.