71 Pa. Stat. § 885
Hereafter it shall be the duty of the state treasurer, before he enters upon the duties of his office, to take the oath or affirmation of office agreeably to the direction of the constitution of the United States and of this commonwealth, and he shall become bound to the commonwealth in an obligation, with ten or more sufficient sureties to be approved by the governor, in the sum of five hundred thousand dollars, conditioned for the true and faithful performance of the trusts and duties of his office; and the execution thereof being duly proven, the same shall be entered on record in the office of the secretary of the commonwealth, in a book to be provided for that purpose, and copies of such obligation, duly authenticated under the seal of said office, shall be admitted as prima facie evidence of the fact, execution and contents of such bond in any court of this commonwealth, in all cases in which the original bond would be evidence of the same matter.
71 P.S. § 885