Except as hereinafter provided, before letters shall be granted to any personal representative, he shall execute and file a bond which shall be in the name of the Commonwealth, with sufficient surety, in such amount as the register considers necessary, having regard to the value of the personal estate which will come into the control of the personal representative, and conditioned in the following form:
(1) When one personal representative.--The condition of this obligation is, that if the said personal representative shall well and truly administer the estate according to law, this obligation shall be void; but otherwise, it shall remain in force.
(2) When two or more personal representatives.--The condition of this obligation is, that if the said personal representatives or any of them shall well and truly administer the estate according to law, this obligation shall be void as to the personal representative or representatives who shall so administer the estate; but otherwise, it shall remain in force.