Vietnam - Ho Chi Minh - 2 Dong

2 Dong with prtrait of Uncle Ho, Uncirculated. OB: 3/4 facing portrait of Ho Chi Minh with the legend "CHU TICH HO CHI MINH". RX: value above and below star in wreath with "NAM II" below. Outside the wreath is the legend: "VIET DAM DAN CHU CONG HAO." Planchet edge has pits due to the crude punching out process and the reeding is crude and incomplete. A photo of this is specimen is featured on the PCGS site at this https://images.pcgs.com/CoinFacts/37311309_167788440_max.jpg
KM (Krause/Mishler 'Standard Catalog of World Coins') says that these are found in varieties - I would welcome a Museum project to document as many of these varieties as we can - anyone game?