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
"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
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