The Plainsman is a closed restaurant on Route 66 in Holbrook, AZ. It's just west of the Wigwam Motel at 1001 W Hopi Rd.
This sign has a lot of great things going for it, the "Cocktails" powder horn, the giant rifle, the 60's portrait of the Plainsman himself. The lettering has some nice neon work. I wish I knew what colors they were. The restaurant appears to be closed but I did find a review from March.