I have been asked by a friend to research a gun he recently acquired.
We believe this to be an early bugel spanner by Oscar Will, it has an octaganal barrel and is rifled measuring 0.2" at the breech.
Any information would be much appreciated, especially a date of likely manufacture.
Not sure of a value so that would help also.
Photos in link below.

https://postimg.cc/gallery/nMgjSMK

Many thanks
Steve