An artist's composite view of Silver Springs, Florida
— underwater and above water.
The postcard shown here is a 'linen card,' so known due
to the texture of the postcard's surface [click on image
for enlarged for detailed view]. Linen cards were popular
from approximatey 1931 to the early 1950s.
It was very common for older postcards to be based
on an original black and white photograph, or in this
case photographs, and then colorized and drawn into
to enliven the overall scene. Although today's postcards
are usually limited to glossy, printed color photographs,
I can assure you that there is a lot of Photoshop work
going on to 'improve' the images we mail to one another.