This is the Gyllenberg Family Seal,
dating back to the 1600s,
when our ancestors had nobility confirred upon them in Sweden.
This graphic image was copied from the web site of
The Gyllenberg Bank in Finland
www.gyllenberg.fi, and it matches the seal
from the book Svenska Adelns Ättartavlor III
The chapter on
(The Noble Family GYLLENBERG, no. 1030,)
You can also visit the Gyllenberg Art Museum
www.gyllenberg-foundation.fi