Hall's postal balance made by Parnell, London, 1863-1875

Brass self-indicating Letter Balance with case, 1863, (Hall's patent, made by Parnell, London). Indicating from 0 to 4oz. with corresponding letter charges up to 8d (2d per 1oz.). Sensitivity 30.0gr.

Postal balance, Hall's patent, made by Parnall, London for estimating the postage due on letters being sent by mail. Patented by the inventor in 1863, the self-indicating balance works on the pendulum principle.

Details

Category:
Weighing & Measuring
Object Number:
1934-88
type:
postal scales and pendulum balance - scales
credit:
Spero, L.H.

Parts

Brass self-indicating Letter Balance

Brass self-indicating Letter Balance

Brass self-indicating Letter Balance, 1863, (Hall's patent, made by Parnell, London). Indicating from 0 to 4oz. with corresponding letter charges up to 8d (2d per 1oz.). Sensitivity 30.0gr.

Object Number:
1934-88 Pt1
type:
postal scales and pendulum balance - scales
Image ©
The Board of Trustees of the Science Museum
Case, for Brass self-indicating Letter Balance, 1863

Case, for Brass self-indicating Letter Balance, 1863

Case for brass self-indicating Letter Balance, 1863, (Hall's patent, made by Parnell, London).

Object Number:
1934-88 Pt2
type:
instrument cases
Image ©
The Board of Trustees of the Science Museum