How many different Harrahs have had unique cards with their names on them. These cards were issued prior to the Harrahs Gold program.

I know of the following:

Harrahs Tahoe/Reno (blue)
Harrahs Del Rio Laughlin (white Grande club)
Harrahs Gold Atlantic City (gold with sailboat)

Harrahs Gold card with purple stripe at bottom,
city name in white at top right corner:
Reno/Lake Tahoe
Lake Tahoe/Reno
Las Vegas

any others?