Prison laborers working at a vineyard under guard at Avelsbach vineyard of Staatliche Weinbaudomäne Trier.
This fantastic images show the construction of a vineyard at Domäne Avelsbach. This estate along with Ockfen and Serrig form the three estates of Staatliche Weinbaudomäne Trier. This winery was founded in 1896 by the Prussian State government. Ockfen was built using free laborers whereas Avelsbach and Serrig used the relatively cheaper prisoner laborers. If you look at the top left corner of the photograph you will see a man in the dark uniform standing on a rock outcropping. He has a rifle slung over his shoulders. Does anyone have references for prison laborers working in the vineyards of other countries?
 Weinbau und Weinhandel an Mosel, Saar und Ruwer : ein Rückblick auf die letzten 100 Jahre. Meyer, Felix. 1926. Dilibri Rheinland-Pfalz. URL: http://www.dilibri.de/rlb/content/titleinfo/1069369