Okla. Stat. tit. 67, § 309

Any microfilm, duplicate created in a manner acceptable to the State Archives and Records Commission, or microphotograph film, of any original record or archives shall be deemed to be an original record or archive for all purposes and shall be admissible in evidence in all courts or administrative agencies the same as the originals. A facsimile exemplification or certified copy thereof shall for all purposes recited herein be deemed to be a description exemplification or certified copy of the original.