Building off the ideas shared in these posts, I like the idea of following $300 series:

"Wild Wild West 1800s" at the top of each $300.

Possible designs.
1. Nevada Seal
2. Miners standing front of Mine, "Gold Rush" at bottom of design.
3. American Buffalo- use 2008 Gold Buffalo $50 design- A gold Buffalo on a $300 would be pretty hot. "American Buffalo" listed at bottom of design.
4. 1800's town street "Before Vegas" at bottom. Keeping in mind Las Vegas did not become a city until the early 1900s.

Last I heard Gaming will not approve a collector's series but would guess each $300 could be approved as indiviual submissions.

Any other ideas on for "Wild Wild West 1800s" designs?