I am looking at a Conn alto sax. Its serial number is M249,XXX- so 1932 is the year of manufacture.-The seller says that it is "the same model as the 6M, which started being marked as such a year or so later". It is brass in color, and has rolled tone holes, an adjustable, right thumb hook. The neck is underslung octave key type, with the microtuner neck, the neck to body tendon connection, is of the non leakable double sleeved labyrinth type configuration. It has 2 extra keys, a "G" to "G#" articulated trill key, and a "D" to "Eb" articulated trill key. Is this really the same as the 6M or is it different, the "Transitional"???
It's a transitional model prototype 6M. It sounds more like a 6M than a New Wonder Series II. The neck and bell key configuration is the same as a 6M. It may not have all the features and keywork of the 6M however. Between 1932-1932 there was a lot of experimentation. Yours is definately an early prototype 6M