Postal. Sales d'emblanquiment i d'assecat. The Royal Mint. Londres. Principis del segle XX.
46151
Carte postale
Cartolina
British Royal Mint
Documentació numismàtica
Époque contemporaine (Cap a 1910-1930)
Ample 39.00 mm
Alt 140.00 mm
Alt 140.00 mm
Postal de les Sales d'emblanquiment i d'assecat en la seca de Londres. Pertany a una sèrie sobre l'encunyació de moneda en la Royal Mint.
A/ LONDON. THE ROYAL MINT. BLANCHING OR PICKLING ROOM AND DRYING ROOM.
R/ POST CARD - British throughout
BLANCHING OR PICKLING ROOM. The Rotary Earthenware Barrels (Top View).
The blanks after annealing, are given a suitable acid treatment in these barrels, until the surfaces of the blanks are quite bright.
DRYING ROOM. The Rotary Hot Air Dryers.
After acid treatment, the blanks are dried by revolving them in drums through which hot air is circulated.
A/ LONDON. THE ROYAL MINT. BLANCHING OR PICKLING ROOM AND DRYING ROOM.
R/ POST CARD - British throughout
BLANCHING OR PICKLING ROOM. The Rotary Earthenware Barrels (Top View).
The blanks after annealing, are given a suitable acid treatment in these barrels, until the surfaces of the blanks are quite bright.
DRYING ROOM. The Rotary Hot Air Dryers.
After acid treatment, the blanks are dried by revolving them in drums through which hot air is circulated.
05-06-2020