C.T. Ham Gem 
Early unmarked model ( only one known)
Circa pre 1890
Solid brass construction with tin bottom.
Features a 9/16 fill on front of fount with the pin globe lift on reverse.
The pin lift goes thru the fount and is soldered on bottom.
Cobalt blue globe is  magnificent, makes the brass pop.
Globe is marked GEM CTH MFG CO

Condition  - near perfect patina , unrestored,  untouched. 
No cracks or Condition issues in the brass.
The bottom tin fount shows some rusting coming but no holes present. 

** has not been oil tested **