Dating postcard photographs
Cards previous to that had to have the Private Mailing Card Statement. There was often a statement that said "this side for address only." The postal service started allowing the use of divided back postcards in March of 1907.
So, if your card is marked "Private Mailing Card," is dates from 1893 - 1901. A divided back postcard (example 3) has a line down the middle, or some other indication that one half of the back is for the address and the other half is for a message. If your postcard has an undivided back, it is from 1907 or earlier. during World War I in order to save ink and estimated to have saved 20% more ink.
The message, therefore, had to be written on the front (picture side) of the card.
For this reason, there is writing on the face of many cards; this is becoming more acceptable on cards of this era. The divided back made it possible for both the address and the message to be on the back of the card.
All cards during this era had undivided backs of privately printed cards.
All cards during this era had undivided backs and only the address was to appear on the back.
Do you have an old postcard and curious about its age?
Research has already been done by earlier historians and guidelines have been put into place.
Mashburn (Colonial House) The dating of the postcard for years or eras of issue can be accurately determined if the card is studied for identity points.
There were seven eras for the postcard industry and each one has distinguishing points to help establish its respective identity.
However, there are many postcards that were never mailed or that a part of the post mark is illegible or soiled.
Here are some general guidelines to help determine the age range of your post card.