SS blood group tattoo

Hi there just wondering if any one knows if there is a picture/photo of an SS blood group tattoo? All i know about them is they were under thier arm? Not sure which arm or where? Any info. on this subject would be greatly received.Many thanks in advance.

http://www.axishistory.com/index.php?id=2030

Hi thanks for the info. it was realy helpful.:smiley: