My Edeophone 56 key extended treble has raised ebony ends, and was made in the early 1900s. That seems to be a good period...my instrument has a sweet sound, but will also drive the notes out if played harder. The only problem, which is well known for Lachenal instruments, is that the Lachenal action (hook and lever) can be noisy, so it is difficult for recording. A few years ago I had a Lachenal metal ended TT that had the action replaced with a riveted action (much quieter) by Concertina Connection...it was superb...however my family deemed it TOO LOUD, so against my own advice I sold it. RJ