According to In Memoriam and the ' Nederlandse Oorlogsgraven Stichting' Benno Meijer died 5 March 1943.
In the 'Groninger Archief'' there is a death certificate from 1951 where the date 5 March 1942 is mentioned.
Groninger Archieven, aktenummer 159, registratiedatum 19 januari 1951