Postcards that are actual photographic replications were first produced around 1900.They may or may not have a white border, or a divided back, or other features of postcards, depending on the paper the photographer used.When received at the Newberry Library it was estimated at 2.5 million total items and over 500,000 unique postcard images. Nancy Loe has an MA in American History and an MLS in Library Science and Archives.The core of the collection is the Records of the Curt Teich Company, which includes over 360,000 images produced by the company from 18, over 110,000 production files documenting the creation of the company’s postcards, and additional company records. She has appeared on PBS’s American Experience, at Rootstech, SCGS Jamboree, and state and regional genealogy conferences.Any other alpha character after the number indicates it has more than one subject listing or the same number was used on two different views.(This is mainly found with the very early Teich postcards and with V.0.A small number of cards also filed with this series begin with "BS," "DT," "RG," and "RT." After approximately 1924, the "A" or "R" may not appear on the card at all.
Then the Postcard changed around 1901, the word postcard was printed on the back which was an undivided back, meaning there was nothing separating the sides for address and notes because you still wrote your notes on the front and the address went on the back.
Many of the real photo postcards being done at the current time are reproductions of earlier historic photos.
The easiest way to distinguish a real photo postcard is to look at it under a magnifying glass; it will show smooth transitions from one tone to another. (Britain had already pioneered this in 1902.) The address was to be written on the right side; the left side was for writing messages.
Listed below is a portion of the knowledge base that exists to help in dating old postcards. The production dates were not recorded by the company at this time, but from copyright dates found on some of the cards, it has been determined that these cards were produced between 19.
The next card series began with either "A" or "R"* and were numbered from 1—124180.