That's a slant grip Webley senior. They ran from around the mid 1930's to the (I think late) 1960's.
I've got one from the 60's in very good condition and got offered around 230usd for it at one point. Obviously the pre WW2 ones are worth the most. There are a few threads that tell you how to get a ballpark 'age' from the various markings as well as the serial number/ lack thereof.
They're awesome little guns with some interesting design. Tom Gaylord/ bb pelletier did a write up on them at one point which is worth a read.
Nice find and nice gun. It may very well be fine with just a good cleaning and lube. Not sure of value on that one, but have seen nice boxed seniors priced at $350 or so at airgun shows. They are nice shooters and would be worth the restore.
I have just inherited a Webley-Scott “SENIOR” air pistol in excellent condition. It is pre 1958. Has a holster, box with a second smaller bore barrel, cans of two sizes of pellets, a collection of darts etc. Can you tell me something about this pistol. Is it rare?
And the pellets in old ammo tins, .22 on left, .177 on right and both bore size darts as well . I am fairly certain my father would have gotten this pistol in late 1930’s. Birmingham 4 on barrel certainly makes it pre 1958, post 1933.
The Webley Senior is a fine example of pre-plastic, pre-build-'em-cheap-as-possible, all-machined-STEEL air pistol manufacturing excellence. Here's hoping whoever neglected that one into the value of a trot-line weight did so out of "what the hell happened to my baby", rather than "I wonder where that BB pistol went". Regardless, NICE TROT-LINE WEIGHT!
You got yourself the finest built pistol of all time ….hand built from a solid profile machine forging …
Webley slowly went downhill after this pinnacle model until we reached the half plastic Tempest before the demise.
In that condition a good £300 Sterling …maybe a bit more with the 2 barrels you got there ..Runs a phosphor bronze piston ring and can make 470 fps ….use car oil to lube it, it does not quite manage to diesel at this power level….use std 30 wt motor oil …ideal for the metal to metal contact of the piston ring..
Clean it out and lightly oil…wipe it over with oil…..air loom pistol….
Use to use a .22 version for bopping rats at short range when a kid….Later had the Premier but it was not quite so well made as the Senior.