A Dutch publication ("Een zaak van landsbelang; Nederlandse postcensuur in de Eerste Wereldoorlog", by John Dehé and Fons Simons (2014), number 31 in the series of dutch publications on postal history) describes the censor mark.
I am not a specialist. In Zeeland a lot of (civilian and military) mail has been censored by the military authority (page 77). The censor marks of Zeeland mostly have been used on Dutch foreign mail. (page 80). The Zeeland censor ended 1st July 1917 (page 82).
Hope this helps.
I am not a specialist. In Zeeland a lot of (civilian and military) mail has been censored by the military authority (page 77). The censor marks of Zeeland mostly have been used on Dutch foreign mail. (page 80). The Zeeland censor ended 1st July 1917 (page 82).
Hope this helps.