Nowadays, the 50 real coins are very well known all around the world. Very important public and private collections count with a cincuentín from Segovia. The price of these coins clearly increased during the last 10 years, but it is still very difficult to estimate. As an example, we can see another 50 reales 1618 that was auctioned by Áureo & Calicó in 2014 for 90.000 euros, while that same one specimen only reached $48.000 last January. On the other hand, another specimen was not sold for 25.000 euros in 2015 while a year later it was auctioned for 38.000 euros. We can also take into account that a 50 real 1620 EF was hammered by Áureo & Calicó in 2014 for 40.000 euros and this 50 reales 1623, of similar quality, was hammered for 53.000 euros in 2015. As 1620 and 1623 are more scarce dates than 1618, I consider that a reasonable hammer price for the coin in the auction is between 30.000 and 40.000 euros.
Description from the seller
1618/7. Felipe III. Segovia. A. Cincuentín. (Cal. 80, imagen de portada). 178 g.
Insignificante hojita. Preciosa pátina. Parte de brillo original. Magnífico, es el segundo cincuentín más bello que conocemos. Ex Áureo & Calicó, Selección 2008, nº 119. Rarísima así. EBC.