| Description | .Electrical Products And Services trade guide items 1- 3, 3 pages, dated 1966, Torostats Vitreous Enamelled Toroidally Wound Rheostats, section D list 66-2 brochure, dated 1966 . Torostats Vitreous Enamelled Toroidally Wound Rheostats, section D list 67-1 leaflet, dated 1967.
.Torostats Vitreous Enamelled Toroidally Wound Rheostats, section D list 69 leaflet, dated 1969. |