My friend, who is eternally grateful to you all for helping with the horn beaker, has now thrown this query into the ring. 
He thinks that it might be foreign and would be grateful if anyone is able to read what is on the back of the silhouette:

It is currently for sale and so the number is probably the lot number.
The front:

Thank you.
He thinks that it might be foreign and would be grateful if anyone is able to read what is on the back of the silhouette:

It is currently for sale and so the number is probably the lot number.
The front:

Thank you.
Dutch or Belgium.