Hey Bruno, I’m trying to date Hohner models in terms of years of production. You are a guy who digs up information. I have seen no list for Hohner models like the ones you and I found for Suzuki. Have you seen anything like that for Hohner or any kind of specific information about years of production? The Piano 36 seems to have first appeared in 1970. The differences between your three models seem small but show that they continued to work on this model. I don’t have a good idea about when Hohner stopped making the Piano 36 or the early 1970s Piano 26, 27, and 32. I have asked Hohner but don’t get a response.