Scarce United States Postal map of South Dakota, published in by the post office in 1926.
The map identifies the active postal routes in the state, along with post offices, discontinued post offices, towns without post offices, as well as a detailed account of the different mail services:
- Once a week (dotted line)
- twice a week (dashed line)
- three times a week (solid blue line)
- six times a week (black line)
The different types of service are also noted:
- Beginning and ending of routes
- Special Supply Routes
- Rural Delivery
- Mail Messenger
- Railroad Stations
- Electric Railroads
The early postal route maps published by the US Government are rare on the market. The earliest North Dakota map we note was issued in 1897.
OCLC locates only 1 other example of the map published in the 1920s (1924 edition at Valley City State University).