Dating a Real Photo Postcard and other tidbits.

You can date this RPPC (real photo postcard) by studying the stamp box.  This will not work if the postcard has been mailed and the stamp box is covered.  This particular postcard is an AZO postcard produced by Eastman Kodak.  They had many styles of stamp boxes.  The triangles, diamonds indicate years of printing.  4 Triangles pointing up (corners) helps you date the card which is from 1904 to 1918.

This postcard also uses the mask system where a template is placed on top of the photo.  I am not sure how they got the fuzzy edges.
 
The Post Office did require a few rules as to the printing of these personal family postcards.  You had to have the words Post Card printed on message side, no specific rule on style of lettering or size so you do see some interesting letters.  Also required were the words Correspondence Here and Address Here.

Fashion helps indicate the date of a postcard.  I have observed in this postcard 3 ladies dressed quite nicely but the man appears to be wearing an apron.  That could call for many conclusions.  Maybe it is a family outing and the brother is doing the cooking.

I got this information from Real Photo Postcards KwikGuide by Gary W. Clark