Help identify this unnamed Double-Bass

[Anton Johannes Hejl]

This is my first post as a new member of this forum. All suggestions about the origins and year of this bass are welcome.

Link to pictures of my 4/4 roundback which has been expertly restored by Erik Hoffmann in Copenhagen: http://imgur.com/a/MwlQ1/embed#8

Dimensions:
D - 111,5
49 - 35 - 68 - 22

Would be interesting if anybody recognizes details on the bass - like the interesting "smiling frog" design of the plates on the headstock.

Cheers,
Johs