Having matching numbers is nice, and adds to the collector value.
The Mark VI (mark 6) was the last big bore Webley, and was the standard British sidearm in WW I. I have one dated 1917. The proper holster for the WW I gun is leather. Don't know about the cleaning rod, sorry.
The Mk VI was secondary standard in WW II, and guns still in the inventory were issued and used, although the 'proper' (firstline standard) for WW II is the Webley in .380 (aka .38/200 aka .38 S&W -[not the .38 Special])
Mk VI's used in WWII often rode in a canvas (web) holster, normally a light tan/yellowish color, if the original leather was not available. I have one of these, a full flap, very practical piece for durable carry, but not for gunfighting.
Webley values are all over the map, and have climbed a lot lately. Local interest and collector interest makes a difference too. I gave $125 for mine, but that was over a decade ago, and I have seen earlier marks going for huge money ($800) due to their rarity.
Un cut, all original, and in good shape, its worth the most it can be, but unfortuantely, I can't tell you what that is today, sorry.
Webley Mk Vi Serial Numbers
The Webley Mk IV.38 is an accurate and enjoyable revolver. While it’s finish may be worn down, it’s soaked in history. You don’t buy this gun for competition or for self-defense, you buy it to feel closer to our collective past and to have a great range day with your dad. Webley offered the Mk IV to the British government but they and the government got into a tiff over cost and changes the government wanted, so the government developed its own.38 revolver, the No. 2, commonly called the Enfield revolver. Is there a way to get an approximate date of manufacture of a.38 Webley MkIV from its serial number? Mine is marked 'WAR FINISH' with serial number 926xx. No special property marks, just standard British markings. On the Webley barrel by the cylinder it tells to the caliber and it is stamped 3 1/2 ton. What is meant by 3 1/2 tons. Also, is there a way of telling when this thing was produced by the serial number? Thanks for all your help. Production of commercial Mk IV revolvers was resumed after the war, and serial numbering reached 172,219 as of 14 May 1947. - After 14 May 1947 serial numbers were prefixed by the capital letter 'A', and production continued for another ten years. Webley Mk IV.38 double action break-top revolver. Possibly ex-police gun. Barrel marked “Webley & Scott Birmingham”, ”Made in England” and has Webley logo and British proof marks. Frame marked “AA2190” (police number?). All serial numbers match.