In the early 19th century, the Danish currency was 1 daler (dollar) = 6 mark. 1 mark = 16 skilling (shillings).
The symbol for a mark was this:
Is this symbol available in Unicode?
As promised in a comment to @Wolff, here is an example from Hans Christian Andersen’s book “En digters Bazar” (from 1842). He explains that a Guilder is worth 5 Marks and 8 Shillings:
The Nordic Mark Sign is U+20BB. The example is shown here: https://unicode-table.com/en/20BB/
Your example looks like a different design, perhaps depending on the font?? Or perhaps the Danish version was different?
There are some fonts which have a glyph – but again these look like different designs. See those shown here: http://www.fontspace.com/unicode/char/20BB-nordic-mark-sign
Source : Link , Question Author : oz1cz , Answer Author : Billy Kerr