The bonds, and the coupons, if any, attached to the bonds, shall be executed in the name of the college for whom the bonds are issued in such manner and by such person as the board shall from time to time determine, and the seal of the board shall be reproduced, affixed to or impressed on each bond. Any coupons attached to the bonds shall be authenticated by the facsimile signatures of one or more of the persons signing the bonds. The delivery of the bonds and coupons so executed shall be valid notwithstanding changes in officers or seal occurring after such execution and prior to the delivery thereof.