5 C. Postal stamp with overprint in type I and 45 C. Postal stamp with overprint in type I, mixed franking as properly franking on cover from \"Dunkerque north 24.7.40\" to Dunkerque north with arrival stamp from 35.7.40, the perforation partly a little rust-stained, photo expertize Tust BPP: \"the franking composition is rare. \", Michel 1.000.- (kindly note that the certificate Tust BPP the Michel numbers 6 I and 14 I corroborate, it be however here about public stamps act. )