Perhaps some of you are aware of this book already but to those who are not I can highly recommend this book. With excellent reference photos all the variations and their subvariations are shown including tabels with serial # ranges, highly detailed photos of the centre medaillion variations, screw variations, engraving and mintmark variations, award document variations etc. etc. I would say this book is a must for collectors of the Order of the Red Star
Shown here are a few samples of what to expect:
Bookmarks