Montana Gov. Brian Schweitzer and representatives from Guinness World Records are expected to attend the celebration.
Breuning was born on Sept. 21, 1896, in Melrose, Minn., and moved to Montana in 1918. He worked for the Great Northern Railway for 50 years.
His wife, Agnes, died in 1957. The couple did not have any children.
The Associated Press contributed to this report.
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