i separated them into groups…(flowers,cities, couples, children&hollydays, women, other):

A) flowers : http://imageshack.us/g/707/p1040747w.jpg/
the postcards date (as uploaded from first to last ) : 1901 aug 25, 1906 sep 3, 1904 jan 1, 1906 jul 24, 1906 jul 26, (please keep in mind that the following 8 postcards are from the same serie, hard to find something like that ) 1901 jan 3, 1901 jan 21, 1901 nov 27, 1901 dec 27, 1902 feb 11, 1902 mar 29, 1902 apr 14, 1903 jan 4;

B) cities (black writing) : http://imageshack.us/g/404/p1040780e.jpg/
the postcards date (as uploaded from first to last ) : 1902 aug 30, 1903 jul 28, 1903 dec 29, 1904 aug 15, 1905 jul 26, 1905 sep 6, 1906 jul 7, 1906 aug 26, 1906 sep 3, 1906 dec 7 (this is a serie also …also i think it’s the same with the next one..but the writing is in red not in black)

C) cities (red writing) : http://imageshack.us/g/268/p1040801i.jpg/
the postcards date (as uploaded from first to last ) : 1905 jul 22, 1905 aug 11, 1905 oct 24, 1905 dec 30, 1906 aug 15, 1906 aug 26, 1906 sep 20 …the last 2 are a little different but from the same serie i think : 1908 jun 6, 1908 jun 6

D) coulpes : http://imageshack.us/g/225/p1040821o.jpg/
the postcards date (as uploaded from first to last ) : 1902 jan 10, 1902 jul 21, 1902 nov 21, 1904 jun 20, 1904 aug 2, 1904 aug 29, 1905 apr 24, 1905 sep 4, 1905 dec 27, 1910 jun 4

E) children & hollydays : http://imageshack.us/g/715/p1040841o.jpg/
the postcards date (as uploaded from first to last ) : 1901 aug 28, 1901 dec 20, 1901 dec 21, 1902 feb 11, 1902 feb 17, 1902 – , 1903 dec 31, 1904 dec 24, 1906 mar 11, 1906 apr 14, 1906 jul 10, 1910 apr 11, 1910 may 26;

F) women : http://imageshack.us/g/13/p1040870y.jpg/
the postcards date (as uploaded from first to last ) : 1902 aug 28, 1903 jul 11, 1904 dec 30, (next 3 are a serie) 1911 apr 14, 1912 oct 11, 1913 nov 14, 1917 aug 8;

G) other : http://imageshack.us/g/689/p1040887s.jpg/
the postcards date (as uploaded from first to last ) : 1901 apr 20, 1901 may 23, (cats from same serie) 1902 feb 11, 1902 feb 30, (these 2 same serie i think ) 1901 dec 10, 1907 jun 31, (caricarures are same serie) 1903 jan 8, 1905 jul 23

I am looking for someone to give me an estimate value on them…
How do i know the dates…?(they are either stamped on the letters or written on them…you can also see them in the pictures)
Took some time to put them in order but it’s worth it…:)
Waiting on your questions and offers perhaps…