Scott #: 2019
This stamp was issued to commemorate "Stamp Day".
This is a Swedish 17th Century two-masted topsail schooner which carried mail and sailed between the German Baltic town of Stralsund and southern Swedish port of Ystad from 1692 to 1702.
There is an error in this stamp: The flags are flying opposite direction of sails.
Source: Wikipedia and Danstopicals.com