The Illinois Central Railroad (reporting mark IC), sometimes called the Main Line of Mid-America, was a railroad in the central United States, with its primary routes connecting Chicago, Illinois, with New Orleans, Louisiana, and Mobile, Alabama. A line also connected Chicago with Sioux City, Iowa (1870). There was a significant branch to Omaha, Nebraska (1899), west of Fort Dodge, Iowa, and another branch reaching Sioux Falls, South Dakota (1877), starting from Cherokee, Iowa. The Sioux Falls branch has been abandoned in its entirety.

https://en.m.wikipedia.org/wiki/Illinois_Central_Railroad

Handlan flat top model marked I.C.R.R.
Globe is embossed Handlan and etched I.C.R.R.
Fount is correct with matching marked No.1 bayonet brass  burner , marked for Handlan St. Louis on the thumbwheel.

Condition - excellent,  bright tin remaining,  with light surface rust in spots.
Fount is clean , burner is free and turning.
Unrestored 
Bail hasa different patina , may be a replacement.
No visible  condition  issues present.

** has not been oil tested **