Letters of administration must be signed by the judge, under the seal of the court, and substantially in the following form:
State of Oklahoma,
County of ______
C D is hereby appointed administrator of the estate of A B, deceased.
Witness G H, judge of the county court of the county of ______, with the seal thereof affixed, the ______day of ______A. D., 19__.
(Seal and the official signature of the judge.)
Okla. Stat. tit. 58, § 121