Physical description
Mercury filled glass bulb, internal part of a Scalebuoy invented by Abbott Bros Bendigo, used to prevent build up of scale in water tanks, etc.
Inscriptions & markings
A.C.Scalebuoy. Bendigo Electronic Coy Patd.
Mercury filled glass bulb, internal part of a Scalebuoy invented by Abbott Bros Bendigo, used to prevent build up of scale in water tanks, etc.
A.C.Scalebuoy. Bendigo Electronic Coy Patd.