The faith and credit of the county shall be deemed to be pledged for the payment of said notes with interest in the manner and from the funds herein specified as though a statement to that effect were endorsed thereon. All notes issued under sections 50.070 to 50.140 shall be registered immediately before delivery in the office of the county treasurer and the clerk of the county commission, in books kept for that purpose, which registry shall show the number, date, amount, date of sale, name of the purchaser and the amount for which the notes were severally sold, and such notes shall have preference and priority in payment, from the date of registration, over all notes and warrants subsequently issued and registered in such counties and over all prior issued unregistered warrants.