Switzerland
Confederation gold 100 Francs 1925-B MS65 NGC, Bern mint, KM39, Fr-502, HMZ-21193a. One of the most popular and desirable 20th century world gold type coins. With a mintage of just 5000 pieces, this coin is a classic rarity, with enough that one can find a nice example if they are patient, but not so many that there isn't always strong demand for them when they do come up for sale. A few scattered marks, but overall quite pleasing and original.
Estimate: 18000-20000 USD