Section 9. Every person having custody of any public record books of the commonwealth, or of a county, city or town shall, at its expense, cause them to be properly and substantially bound. He shall have any such books, which may have been left incomplete, made up and completed from the files and usual memoranda, so far as practicable. He shall cause fair and legible copies to be seasonably made of any books which are worn, mutilated or are becoming illegible, and cause them to be repaired, rebound or renovated. He may cause any such books to be placed in the custody of the supervisor of records, who may have them repaired, renovated or rebound at the expense of the commonwealth, county, city or town to which they belong. Whoever causes such books to be so completed or copied shall attest them, and shall certify, on oath, that they have been made from such files and memoranda or are copies of the original books. Such books shall then have the force of the original records.