OK, so the shape of the panel buttons didn't change until the 23 series? I thought that happened with the 22's but judging from the photo above and the owner's manual illustrations, I was mistaken.
Steve, I'd take that Superba if I lived closer. For now the Supreme is almost the same machine, is an unusual one, and I'm enjoying her. This is my first rapid advance timer, so the Supreme seems very luxurious. If a KDS22 should surface locally I probably will want to secure it, but unlike with the Thermador there won't be a big rush to replace the Supreme.