The Dutch One guilder coin struck under the reign of King William II was a unit of currency in the Netherlands.

After some trial strikes dated 1840, production began in 1842 and continued without interruption until 1849; the year in which William II died.

The year with the highest mintage was 1848, 13.6 million, or 38.7% of the total amount struck is dated 1848.

Then, on 31 December 1931 all Dutch guilder coins struck prior to 1922 were redeemed and demonetized.

The number of coins handed in this way was quite low, probably many of them had been melted down for their silver content.