Many "Richards" branded shotguns in the late 1800s and early 1900s imported to U.S. from Europe. Some high value Westley Richards guns were made in England, other rather valueless English and Belgian guns came over also. Be careful not to shoot these without inspection by a gunsmith.
when did the make the smithsonian double barrel shotgun
No
no homer Simpson did
YES
The current Barrett Firearms does not make a double shotgun. Exactly how is your gun marked?
The front trigger opened the breach.
Impossible to answer. It HAS other markings on it somewhere.
Impossible to answer with information given. No make, no model, no condition?
Most likely Stevens they did make a model #5100
You must call Browning to find out.
A few years either way of the turn of the century
We have SOME original parts for that model, we make others. sales@countrygunsmith.net