All conveyances of real property executed more than ten years earlier, by executors or trustees under foreign wills and prior to the date upon which the will was admitted to probate in Iowa or prior to the expiration of three months after the recording of a duly authenticated copy of the will, original record of appointment, qualification, and bond, and in which the will was, subsequent to the conveyance, probated in Iowa, and in which a duly authenticated copy of the will, original record of appointment, qualification, and bond was, subsequent to the conveyance, made a matter of record as provided in those sections, are legalized and valid in law and in equity as though the will had been probated in Iowa prior to the conveyance. However, this section does not affect pending litigation.