Not a Parker but looking for some help

[James Palmer]

Ran into this gun today.

It is an English 28 ga with 30 inch barrels. It is marked James Roberts in addition the the marks in the picture below.

Anyone have any idea or information on the maker?

[Eric Eis]

Might try asking over at Doublegunshop.com

[John Campbell]

Looks to be a low-mid level sidelock with very good remaining colours. There was a J. Roberts & Co. in Soho, London, in the late 1800s. That much from Boothroyd. They once built some Cogwell & Harrison guns.

Best, Kensal

[edgarspencer]

The duckbill lock plates are very characteristic of Rigby sidelocks.