Detailed wall map of the United States issued by the Hamburg-American Line (HAPAG) to illustrate their routes and connecting routes to and within the United States and Canada.
The key differentiates between passenger and freight versus pleasure trip routes operated by HAPAG.
The map also designates Indian Reservations and National Parks.
The national highways do not seem to be numbered, indicating a date before 1926, but this is not well established, and the map could be from the 1930s.
Some wear at old folds, including small spots of loss, backed with linen on the verso.