Postcard Eras

For those who need to know these things, here are the postcard eras.

• Pioneer Era (1893-1898)
• Private Mailing Card Era (1898-1901)
• Undivided Back Era (1901-1907)
• Divided Back Era (1907-1915) note: although "divided backs" is a term used to describe newer cards as well.
• White Border Era (1915-1930)
• Linen Era (1930-1945)
• Photochrome Era (1939-Present)
• Real Photo Postcards (1900 to Present Day)