Hanover Bahnpost (DE)

From Stamps of the World

Postmarks placed as Ambulant in railroad travelling post offices. There were Bahnpost trains from HANNOVER to BERLIN, COELN and DEUTZ when the German Empire was created.

Source: Peter Feuser 1983

Postmarks in German Reich

Postmarks in North German Federation

HANNOVER-COELN in 1868.