License, verbatimCC0
Museum Rotterdam, via Europeana: image published under Creative Commons Zero 1.0 (http://creativecommons.org/publicdomain/zero/1.0/). Rights statement as supplied by the contributing institution to Europeana.
Ovaal zwart geëmailleerd armschildje met "BLOK-PLOEG L.B.", met leren riempjes aan weerszijden. 1935. Europeana (aggregator, 4,000+ institutions).