I am unable to find Rawlins,MO. I find people with last names of Rawlins living in MO.
The collector stated he could find a major Rawlins Road, but no indication of a village/town/city with that name.
There are some examples of towns in Colorado that changed their names, so you can find tax stamps with both names, but they show up when you look the names up.
I typed "rawlins mo" in a google search and found it located in southern Missouri.
Any chance you have more info, like an actual location or internet link?