They were producing alto and soprano button models. Whether that includes the HM-900 and HM-901 I’m not sure, though I might have that information. The most common button model in the ads from 1961-62 is the green soprano. They also were producing the vertical Piano 26 soprano, which shows in 1962 ads. The vertical Piano 27 appears to have come out a bit later, probably in 1963. It appears in 1964 ads. For both these styles, in any case, the basic design was in place by 1962, and I don’t see any evidence that what I’m calling the vertical style (blow in the end mouthpiece with the instrument typically pointed down) evolved further. No hoses.