21mm, Harrison Log Cabin Political Campaign button with nice  "E. E. Pritchard/Waterbury Con." backmark. This is an interesting variety with a tobacco plant growing next to the cabin!  Very light push to center which is largely absorbed by the design.  The Pritchard backmark is not often encountered and is also found on an 1840's era US Navy button.  I am looking for an example.  If you have one to sell or trade, please contact me, thank you.