The earlier badges have a horizontal pin like the one shown above and the later types have a vertical pin.Also the earlier ones only have a number while the later badges will be prefixed by a letter..B for Army,RN for Royal Navy,RAF for airforce,SA for South Africa,C for Canada..there are a few more but those are the only ones I've seen,if anyone has seen any different letter prefixes then please post. Here is the later type with vertical pin and letter prefix,this one C for Canada. [attachmentid=62745] [attachmentid=62746]