Players of Dutch football club <a href="https://en.wikipedia.org/wiki/nl:CVV_(voetbalclub)" class="extiw" title="w:nl:CVV (voetbalclub)">w:nl:CVV (voetbalclub)</a> in 1930. The 1th squad, we know that because Willem van der Horden is in the middle op the picture. In his time one of the best defenders in the Netherlands.
François Henry (F.H.) van Dijk (11/08/1888-07/07/1977)
<a rel="nofollow" class="external text" href="https://stadsarchief.rotterdam.nl/zoek-en-ontdek/archieven/zoekrestultaat-archieven/?mivast=184&amp;mizig=299&amp;miadt=184&amp;miaet=14&amp;micode=4117&amp;minr=39960722&amp;miview=ldt">Original picture</a> comes from Stadsarchief Rotterdam website. The photography licence is indicated as CC-0.