Roman Imperial Coinage, Volume 5. Part 1, Valerian to Florian, by Percy Webb edited by Mattingly & Sydenham, Spink, London, 1927, 424 pages, 12 collotype plates, original green cloth, paper browned as usual for this issue. Very Good. Both parts of Volume 5 are the scarcest in the series - especially the original printing with higher quality plates.