Okla. Stat. tit. 58, § 111

Letters of administration with will annexed must be substantially in the following form: State of Oklahoma, County of ______. The last will of A B, deceased having been proved and recorded in the county court of the county of ______ and there being no executor named in the will (or, as the case may be,) C D is hereby appointed administrator, with the will annexed. Witness G H, judge of the county court of the county of ______, with the seal of the court affixed, the ______ day of ______ A. D., 19__.