The ‘Ongefrankeerd Zee Brief Passoeroewan’ postmark is known in this one copy only: a ‘Franco Zee Brief Passoeroewan’, also in red, is recorded in two copies of 1850 and 1863.
A page from my prephilatelic exhibition. It shows a letter with the oval postmark Ongefrankeerd Zee Brief Padang, from the major city on Sumatra's west coast. The page demonstrates the research work sometimes involved in making sense of the routes and charges of the trans-continental mail of the 19th century.