The cover of a book about Annamese numismatics and some illustrations from it published in the year 1905.
Albert Schroeder
<a rel="nofollow" class="external free" href="https://www.coinarchives.com/imagedb/hessdivo/332/image00846.jpg">https://www.coinarchives.com/imagedb/hessdivo/332/image00846.jpg</a> (Coin Archives).