“Ammunition boots, also known as ammo boots, were the standard footwear for the British Army in World War II and earlier. They were triple sewn black Scotch-Grain leather ankle-boots of the earlier “Navvy Boot” type, with or without Cap-Toe with a brown Goodyear Welted double sole with multiple rows of hob-nails, nailed leather heel with full inset iron horse-shoe and screw-applied iron half-moon toe protector. The sole has a molded arch in the manner of a fine custom made boot. No more durable boot has ever been made nor any so revered by generations of men in the field or on the parade ground.
The elite Guards regiments would “hot spoon” the dimpled surface of the boots to make them smooth, to achieve a high polish. Ammo boots were replaced by DMS (Directly Moulded Sole) boots in the 1950’s but the Guards Division continued to wear ammunition boots on ceremonial and drill duties until the 1980’s.” – text and photo source – Mr. Sevan Minasian excellent site – classicshoesformen.com