Consider the materials and appearance of a globe or map when dating it.
A firm knowledge of American history can be a significant aid when dating pre-1900 globes.
Using our example, which we have determined was made between 19, we would look at the changes that happened in the 1950s.
The cease-fire between North and South Korea was 1953, Malaya became an independent country in 1957.
The earliest known world maps date to classical antiquity, the oldest examples of the 6th to 5th centuries BCE still based on the flat Earth paradigm.
World maps assuming a spherical Earth first appear in the Hellenistic period.
(Source: David Cobb, Harvard Map Collection)Based on an e-mail exchange between Louise Ratliff and Morgan Yates.Rand Mc Nally USGS Topographic Maps A number which often appears on the panel or in the margin of a map.Take the last two digits of the last four numbers and invert them, e.g., 3680 1209R = 1990.The code will contain four, five or six digits, depending on the month and date.The codes are generally publication dates jumbled in a certain, consistent way that are often preceded by the letter C, although this is not always the case.