Good evening to you all. I'm hoping someone in the know can help me with this. I'm looking to find out the age and value of my Webley Senior, but I've hit a wall on where to look.

Generally speaking I don't just mean "I've seen one go for £85" etc. I'd love some specifics regarding and taking into consideration its age mainly.

I'm aware that there are a few different models out there, and so I'll clarify that I have the slanted grip model, in .177, a knurled barrel with black plastic grips bearing the Webley logo.

My serial number above the trigger begins with 'S', which I believe is an indication that it was manufactured pre-war, and the three digits at the front of the barrel are 258.

Full serial number is S197258.

I'm on my phone at the moment so posting a picture is a bit more difficult, but I will later on if need be. I'd just appreciate any new information on this pistol, as it's a lovely piece. Thanks in advance.