well first you need to figure out if its a enfield revolver no.2 mk 1 (illegally made by enfield from 1923-26 )
or
a webley mk vi (produced from 1915-1923)

enfield illegally copied the webley's exterior but changed the internal dimensions so none of the parts interchanged, webley sued and won

it has enfield mk VI on the side and says 1926 it has also been made to shoot 45 apt rounds

FOUND IT!

Webley Mk VI: Similar to the Mk V, but with a squared-off "target" style grip (as opposed to the "bird's-beak" style found on earlier marks and models) and a 6-inch (150 mm) barrel. Officially adopted 24 May 1915,..... and also manufactured by RSAF Enfield under the designation Pistol, Revolver, Webley, No. 1 Mk VI from 1921–1926

so you have a Webley No1, Mk VI produced at RSAF Enfield in 1926.

...And if it has been altered to fire .45 ACP rounds in half-moon clips, it has lost most of its collectors'-value premium.
Further, it will no longer fire .455 Webley rounds. If you don't want to use .45 ACP in clips, you need to find .45 Auto-Rim cartridges.

It's a nice gun, though.

Don't try to fire modern "personal defense" ammunition in it, as it wasn't built to handle that kind of pressure. Lead-bullet loads are OK.

It seems to be worth about $500.00, more or less.

Saw a .45 acp modified one last gun show asking 545.00 so $500.00 a good ballpark number.

Originally Posted by sgms

Saw a .45 acp modified one last gun show asking 545.00 so $500.00 a good ballpark number.

Gosh—I thought I had said that.