A. POSTEL & FILS.
image by Dominique Cureau, 26 January 2005
The flag resembles that of Compagnie Générale Transatlantique. Family tradition explained that Auguste Postel and the Péreire brothers, founders of CGT’s predecessor Compagnie Générale Maritime, agreed on complementary flags when establishing their companies in Manche. The source challenges this account: CGM was founded in 1855, whereas Postel’s flag appears in an L. Gamain painting dated 1838.