Very tempted more info please,
I love the older Webley pistols but there are a lot of variants of Seniors about and their value depends on condition and a near exact date, you can get a rough idea of the date by the serial No's, they are normally a 3 digit No at the front of the chamber plug, below front of barrel, and then when you remove the left hand pistol grip the serial No is stamped in full, also there should be an inspectors stamp at the rear underside of the trigger guard even this can effect the price. If you have not got Hiller's pistol guide feel free to pm me.
Its nice to see one with undamaged pistol grips, the pics show fantastic detail, this will add or detract to your asking price.
I am sure the experts on here will jump in at some point.
Rgds
Carl.