My understanding is this version with the Patent numbers on it is from the early 1990’s but it first entered production in the late 1980’s.My Amazon Golf Shop: Golf Clubsgolf clubs ironsGolf Equipmentgolf ironsgolferironsLynxParallaxvintageRelated Posts Bones Gets Fit for New Irons at Titleist | From On the Bag to What’s in the Bag November 25, 2025 How Do Golf Ball Collectors Work November 24, 2025 Thoughts on the new Amazon Golf Ball? November 24, 2025 The Swing Fix That Finally Helped Her Compress Her Irons November 24, 2025 Nike Vomero Plus vs ASICS Megablast November 24, 2025 Our Biggest Golf Glove Deal EVER (New line + Black Friday!) November 24, 2025