Herbert A Seaby. Published by B A Seaby, London. 1969. 1st edition. HB (black cloth with gilt-titled spine) v + 161 pages + 1 fold-out list of obverse legends (very handy) + adverts.  Illustrated throughout with b&w photographs in the text. Priced. 135 x 215mm. Even the current edition of this is out of print.  Very grotty and damp-damaged dj, with several tears, stuck to the rear cover. Top of spine badly bumped. Curiously, the contents are rather better than you would expect from the above description! 

This covers Roman silver coins from AD 193-238.

This is a series of five volumes begun in 1952 by Herbert A Seaby.  dealing exclusively with the Roman silver coinage from the Republic through to Romulus Augustus.
It is based on the works of Cohen, so the coins are listed in alphabetical order of the reverse legends, which makes for fast and easy finding.  Volume 5, written much later than the others, is by Cathy King.  The latest editions have been revised by D R Sear and R Loosley. Valuations by various people, including David Sear.