Very NICE! I love the treadle irons and cabinet. That's a cool machine! The message says something about a needle and a wheel.
I put this into a translator: beim nadel einsetgen gefort die lange rine gegen das rad
And this was the message:When needle einsetgen gefort including the length against the wheel
It is difficult to read the writing. Nadel-Einscetgen could be a name of the needle. Germans love to dot their o and u sometimes; so, gefort has the dotted o. You are just going to have to find an elderly German to translate.
Sir Steve, Enjoy that treasure, Simple Gorgeous!