Dating divided postcards
They issued printing sample cards to show to customers directly or via travelling salesmen. The last initial is often misinterpreted to stand for a capital ‘I’ but should be correctly read as a Latin 1 = downtown Vienna postal district.
Usually they took cards they had previously printed (and came out well of course) and added imprints with information on printing style and -name, (minimum) quantities to be ordered, sometimes also prices and how delivery takes and so on. This big publishing firm used the initials on their huge out put of cards quite consequently, sometimes with card number / series information next to initials.
Furthermore it is very helpful to get access to old paper/printing trade publications.
Often they contain valuable information/advertising helpful for identification trademarks, logos etc. Some countries required an imprint on imported ppc’s with country of origin. is of course much better and limits a little bit the circle of potential firms involved.
Old style lithography, looks very much of pre-1900 origin. Age: The age of a postcard can sometimes add to its monetary value.Many collectors today look for the earlier postcards, from around 1898 until the 1940's.Some printers put their initials in regular type with or without card/job number on ppc’s. Sometimes in very small type or hidden inside picture/ornaments etc.