Looking For Book for Works on A Hentschel GF 212 or 210,

by Deedra Nunez
(Eugene, OR)

My dad built a Hentschel GF clock in the late 70's or early 80's.

It is either a model 210 or 212, we would like to find directions/information about the works for it.
It has chains to move the weights.

Thanks for your help.

Deedra