Dutch sterling spoon from 1785

This is my oldest piece of silver, a Dutch sterling spoon from 1785. Surprisingly found in a thrift store almost a year ago.

The marks are:
- a tree, the mark of Carl Wilhelm Höfeld
- Letter X from 1785
- The banner of the city Zwolle (The Netherlands) + RD
- The letter O with a crown. This is a Dutch tax mark from 1807