Hi Don, That should be your serial #. If you look at the other parts of your Mellotron carefully, you will find that number on nearly every major part. It may also be engraved on a small plate on the back of the machine... You'll find it on the underside of the removable wooden blocks on either end of the keyboard, etc. I assume that prior to assembly the entire machine is "kitted" and all of the parts are labeled with that number. Frank Mellotron 400SM #1562
Message
Re:serial # 1354
2003-04-03 by lsf5275@aol.com