Several documents remain from Salomon Krieker:
a letter of reference from the firm J. Bakker, where he was first mechanic from April 1937 until May 1941: 'He has consistently performed all duties assigned to him independently and to complete satisfaction. He proved honest and modest.'
a statement dated 18 July 1941 that Salomon Krieker had attended an electric welding course.
a letter of ref…