Given that the coin has a conservation rating of 100 (S/C), which indicates that it is in very good condition, and considering that this is the first time it is being auctioned, the starting price is set at 1900 euros.

Without historical sales data for this coin, it is difficult to establish an exact hammer price. However, in the case of coins in high conservation condition, it is common for the hammer price to exceed the starting price, especially if there is interest among collectors.

Since there are no records of previous auctions and the starting price is reasonable, an estimated maximum purchase price could be between 2500 and 3000 euros, depending on the interest of the bidders in the auction. This is based on the trend that coins in excellent condition can reach significantly higher prices than their starting price.