Electrotherapeutic machine

Electrotherapeutic machine, wooden case, with metal fittings, by Heller,

Parts

Spark gap for electrotherapy machine by Heller

Spark gap for electrotherapy machine by Heller

Spark gap for electrotherapy machine by Heller, Germany, 1885-1920

Object Number:
A182715 Pt1
type:
spark gaps
Interrupters for electrotherapy machine

Interrupters for electrotherapy machine

Interrupters for electrotherapy machine, wood and brass, by Heller, Germany, 1885-1920

Object Number:
A182715 Pt2
type:
interrupters