Image
Category
On Display
Object type
Material
Maker
Place
Date
Brass self-indicating Letter Balance

Brass self-indicating Letter Balance

1863-1875

Postal Scale

Postal Scale

1890-1910

Balance scales, Roberval's system

Balance scales, Roberval's system

Brass letter balance, Roberval type, 1871-1897

Brass letter balance, Roberval type, 1871-1897

1871-1897

Bilateral pendulum-type letter balance, German

Bilateral pendulum-type letter balance, German

1900-1914

Pendulum-type letter balance, German

Pendulum-type letter balance, German

1900-1914

Quadrant pendulum-type letter balance, German

Quadrant pendulum-type letter balance, German

1900-1914

Letter and parcel balance, Willis patent

Letter and parcel balance, Willis patent

19th century Indian Postal Balance

19th century Indian Postal Balance

Hoopers pocket letter weight

Hoopers pocket letter weight

1840-1850

Hydraulic letter balance

Hydraulic letter balance

1840-1850

Equal-arm Roberval-type letter balance

Equal-arm Roberval-type letter balance

1900-1914

Braby quadrant type

Braby quadrant type

1826

Letter scale, spring balance

Letter scale, spring balance

Columbus model letter balance, German

Columbus model letter balance, German

1900-1914

German letter balance

German letter balance

1900-1914

Double pendulum postal balance

Double pendulum postal balance

Postal scales, Bismar type

Postal scales, Bismar type

Postal scales, self-indicating type, 1900

Postal scales, self-indicating type, 1900

1900-1910

Spring postal balance with dial scale

Spring postal balance with dial scale

1960

Equal-arm Roberval-type letter balance

Equal-arm Roberval-type letter balance

1900-1914

"Osler's Patent Letter Gauge" (c.1839)

"Osler's Patent Letter Gauge" (c.1839)

1840-1850

Parcel platform balance by De Grave London, 1850-1880

Parcel platform balance by De Grave London, 1850-1880

1850-1880

GPO parcel scale by De Grave, London with 6 Imperial weights.

GPO parcel scale by De Grave

1850-1880

"Oslers Patent Letter Gauge" (c.1839). A balance working on a unique principle: an ivory rod is surmounted by an ivory tray for weighing the letter; the rod floats in a tube of mercury, while an iron ring around the rod indicates the weight on a gauge. Under base is a green paper label, printed A.F.OSLER - REGISTERED NO 125 - PERSUANT TO 2 & 3 VICTORIA CAP.17 DECEMBER 12 1839. With ormolu foot

"Oslers Patent Letter Gauge" (c.1839)

1840-1850

Cardboard 'Easy Weigh' postal balance by Royal Mail to check 20, 40, 60, & 100g letters, c.2000.

Cardboard 'Easy Weigh' postal balance by Royal Mail to check 20

2000

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.

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

1863-1875

"Osler's Patent Letter Gauge" (c.1839), Ivory plunger marked to weight 2 ozs to 1/4 oz; a tube of mercury fices in an ormolu socket on a square base. Green label, A.F.OSLER. REGISTERED NO.125. PURSUANT TO 2 & 5 VICTORIA CHAP. 17. DECEMBER 12, 1839

"Osler's Patent Letter Gauge" (c.1839)

1840-1850