The records of all legal instruments which, by law, are directed to be recorded or are entitled to be recorded, and which have been duly executed by the proper party or parties, and which have been acknowledged to and certified by a qualified officer without this State but in the United States, a territory or insular possession of the United States or the District of Columbia, notwithstanding the absence of any authentication, affirming the official character of such officer in conformity with the laws of this Commonwealth in force at the time such instrument was acknowledged, are hereby severally made as valid and effective in law as if each such instrument had been fully acknowledged, certified and authenticated. The record of each such instrument, or the original of such instrument itself, shall be admitted as evidence in all courts of this Commonwealth, and shall be as valid and conclusive evidence as if such instrument had been in all respects acknowledged and the acknowledgement certified and authenticated in accordance with the then existing law.