This 'glossary' - organised essentially in the same way as a dictionary or encyclopedia - dates back to 1934. The edition I have in front of me has the date 1961 inside the front cover. Moreover very little post 1900 material is featured. Apart from being old the glossary is also imperfect in the sense that much that is new has been discovered in the last hundred years, and the black and white images, certainly in my edition, are of variable quality.
Nevertheless appearances can be highly deceptive, for 'Cameron Stone' is one of the most important and useful books on the subject of arms and armour ever published. Its key value is as an identification tool because, for example, if you are faced with some sort of sword all you have to do is turn to the section on swords. You are then presented with perhaps 30 different general types of sword from around the world and two or three hundred different names of sword types,fittings, and sword associated items. Your search can then be refined further by looking up some of these words in other parts of the book. The bibliography can then suggest other relevant book titles.
The reference can also be worked the other way round. For example you are presented with the name 'Ox tongue' and beyond the fact that this term has some connection with arms and armour have no clue as to meaning. Cameron Stone takes you from Ox Tongue to the French 'Langue de Boeuf' - and from here to the information that this was a name for a form of pole arm current in the sixteenth century !
I have never tried to read Cameron Stone from cover to cover - nobody would - but if you are building a general reference library, or are interested in arms and armour, few volumes will be as useful to you as this one.