This is a 'large frame' leather half-holster suitable for the Webley mk VI service revolver or similar, typical of those used in WW1 and WW2. Large frame holsters are longer in the barrel area and wider to accommodate the longer barrels and wider cylinders of the larger calibre revolvers. The leather is in good condition, though no longer very compliant due to age, though a Smith & Wesson .455 calibre will fit with little persuasion. Sound stitching and brasswear as can be seen in pictures. No markings that we can find.