Stamps illustrated are the common issues for the relevant 'postcard rate' of the period.Multiples of lower value stamps were often used, as were stamps higher than the required amount.Real photo postcards are actual photographs printed on postcard paper. There may be some indication on the back of the card about the type of photo paper used - this is often indicated by the stamp box, which will be visible if your postcard is unused. The postage stamp can help you figure out an approximate age of your postcard.
The use of 'Picture Postcards' was first sanctioned by the British Postal Authorities on 1st September 1894.
Prior to this date - pre-printed plain cards were in use which are commonly referred to as 'Postal Stationery' The size of cards varied throughout this period. The 'Intermediate' size of 5 x 3 inches (approx) was followed by the adopted standard sized card 5½ x 3½ inches which was in common use from 1900 until the 1960's The postage rate for postcards was a halfpenny - ½d ½d 1894 - 1900 Vermillion The colour of the halfpenny - ½d stamp was changed in 1900 to meet international standards.
Even so there are instances where this information can be helpful.
Most Real Photo Postcards, abbreviated RPPC, have information on their backs to help in identifying the manufacturer of the photographic paper that was used by the postcard publisher.
Do you have an old postcard and curious about its age?
If the postcard is used, the most check the date on the postmark.
If your early postcard says it was printed in Germany, it is from before 1915. Colored borders, partial borders and scalloped edges can be found.
The photochrome postcard should not be confused with Real Photo Postcards.
Does your card have the words "Private Mailing Card, Authorized by Act of Congress on May 19, 1898" on the back?