12 gauge double barrel shotgun

Question
how can i find out who the manufacturer is and when it was made. all i find on it is a stamping of a flying duck on both sides of the stock section  and a six didget number

Answer
I would take the hand guard off and look there for a name. If none, remove the barrel (open the action)
and see if there anything under it.
Its odd there no manufacturer marked somewhere.
Best I suggest is take it to a very expirenced local gunsmith and see if he recognizes it.
Sorrry I can't be of more help.