Mo. Rev. Stat. § 483.640

On January 2, 1979, all records of the Hannibal court of common pleas shall be transferred to the clerk of district number 2 of the circuit court of Marion County. These records shall be kept and preserved by that clerk as a permanent part of the records of district number 2 of the circuit court of Marion County. The said clerk is authorized to issue certified copies of these records and his certificate of them shall have the same effect as if certified by a clerk of the original court.