In the gold extraction process, finely crushed ores are leached in vats with a very diluted solution…
The present invention relates to a stamp dispensing and envelope handling device. Permits a user to…
A Frue Vanner is a shaking, rubber belt used to concentrate gold ore 'pulp'.
A postage stamp is adhesive paper evidence of a fee paid for postal services. Usually a small rectangle…
"A press or stamp bearing dies on its jaws, or a die and a bed, for imprinting or embossing any device…
A tool in which the wood working end is pointed, blunt, and a continuous edge enclosing an area, or…
This furnace is used to purify a gold concentrate. The gold concentrates, if non-pyritic, are treated…
A stamp used after the Stamp Act of 1765 was passed. The stamp was required to be purchased and placed…
Antioquia, Colombian Republic Stamp (5 centavos) from 1883
Antioquia, Colombian Republic Stamp (2-1/2 centavos) from 1869
Antioquia, Colombian Republic Stamp (1 centavo) from 1892
Antioquia, Colombian Republic Stamp (1 peso) from 1873
Argentine Republic Stamp (10 centavos) from 1867-1873
Argentine Republic Stamp (2 centavos) from 1877-1880
Argentine Republic Stamp (25 centavos) from 1877-1880
Austria Stamp (3 kreuzer 10 para) from 1890 - For Austrian post offices in the Levant.
Austria Stamp (50 soldi) from 1867 - For Austrian post offices in the Levant.
Bolivar, Colombian Republic Stamp (5 centavos) from 1877-1878
British Guiana Stamp (1 cent) from 1862. British Guiana (also spelled Guyana) was the name of the British…
British Guiana Stamp (2 cents) from 1889. British Guiana (also spelled Guyana) was the name of the British…
British Guiana Stamp (6 cents) from 1863. British Guiana (also spelled Guyana) was the name of the British…
British South Africa Company Stamp (1 pound) from 1891