I was updating this and I thought maybe the data could be useful?

Arcade Cards - postcard size, but plain back.
Chrome - Any card after 1939 with a shiny paper surface.
Deckle-edge - ripple or serrated edge cards
"Pre-Linens" indicates any view card, many are artificially colored. Usually pre-1930.
Linen - Postcards from 20s thru 50s using textured, cross hatched surface.
Real Photo - Actual photo on photographic paper, not a printed image of a photograph.
Home Made Photo - A photograph with a postcard back, non-commercial.
View Cards - Cards that feature cities and places within cities.
Rack Card - is a simple and cost-effective promotional piece, for a rack or counter display.

Pioneer Postcards - 1870-1898
Private Mailing Cards 1898-1901
Undivided back - 1901-1907
Divided back - 1907-1915 to present

The Amt. of postage can help date the card.

1872 1¢
1917 2¢
1919 1¢
1925 2¢
1928 1¢
1952 2¢
1959 3¢
1963 4¢
1968 5¢
1973 8¢
1975 7¢
1976 9¢
1978 10¢
1981 12¢ Mar.
1981 13¢ Nov.
1985 14¢
1988 15¢
1991 19¢
1995 20¢
2001 21¢
2002 23¢
2006 24¢
2007 26¢
2008 27¢
2009 28¢
2011 29¢
2012 32¢
2013 33¢
2014 34¢
2015 35¢
2016 34¢
2018 35¢

https://about.usps.com/who-we-are/postal-history/postcard-rates-since-1873.pdf