Hans Sanders (NL)
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Most of the Ga-den Thangkas are made of
silver or debased silver (billon). Begin ca. 1920 the Ga-den Thangka was
known as Thanga Ghabo (White Tangka), be- cause of the bleaching process to which
the coins were subjected before striking in order to hide the poor quality of
the amount of present silver.
The Spink
catalog confirms that some Ga-den Thangka
contains small amounts of gold. The weight of this coins is normal for the coins
of the same types. This suggests that if there is any gold added, it must be a
very small amount.
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