RARE VINTAGE 8K Solid Gold COIN. Christ Redeemer with Wilhelmina of the Netherlands. 1 - Christ Redeemer with Wilhelmina of the Netherlands. 1 Gulden - Wilhelmina - 1890 / 1948. Miniature Gold coins - COLLECTION Italian Religious. Note : STUNNING gold coin collection Wilhelmina of Netherlands 1 Gulden. Wilhelmina - 1890 - 1948!! The world's smallest gold 8K coins. The measures of each Gold 8k coin : 1,1 cm (diameter) with a weigh from approximately 9/10 of a gr to 1.0 gr!! Belonging to my private collection.