All coal and coke sold, except in accordance with a written agreement with the purchaser otherwise, or offered for sale, in this state, shall be sold or offered for sale by weight. No person, firm or corporation shall deliver any coal or coke without first having the coal or coke weighed by a public weigher on stationary scales suitable for the weighing of coal or coke, which have been tested and sealed by an authorized sealer or inspector of weights and measures. Such coal or coke shall be accompanied while in transit by a delivery ticket and a duplicate original thereof, on which shall be distinctly expressed in ink, or other indelible substance, in pounds, the weight of the coal or coke contained in the vehicle or other receptacle, together with the name and address of the seller, the name and address of the purchaser, the signature and license number of the public weigher and the date of weighing, together with the number of bags or sacks of the commodity, when the bags or sacks are representative of the quantity contained in the vehicle used for transporting the coal or coke, provided coal or coke sold or offered for sale in this state in quantities of seventy-five pounds or less, in paper bags, sacks or similar containers, when the name and address of the dealer and the net contents of avoirdupois weight are distinctly and indelibly marked in ink or otherwise on the paper bags, sacks or similar containers, shall be exempt from the provisions of this section requiring delivery tickets and duplicates thereof. One of the duplicate delivery tickets shall be surrendered, upon demand, to any sealer or inspector of weights and measures for his inspection, and the ticket, or, when the sealer desires to retain one of the duplicate tickets, a weight slip, issued by the seller and signed and dated by the sealer or inspector, shall be delivered to the purchaser or his agent or representative, at the time of the delivery of the coal or coke, and the other duplicate ticket shall be retained by the seller for a period of one year, subject to inspection by any sealer or inspector of weights and measures. If the purchaser or his agent takes the coal or coke from the seller’s place of business, a delivery ticket in the form required by this section and signed by a public weigher shall be given to the purchaser or his agent at the time of delivery. No person shall sell or deliver, or attempt to sell or deliver, or offer to sell or deliver less than the amount of coal or coke represented in the delivery tickets therefor, provided a tolerance at the rate of five pounds to the ton shall be allowed for unavoidable wastage and variation in scales. No public weigher shall weigh coal or coke loaded on a vehicle for transportation thereon and sign a delivery ticket therefor, unless he has first weighed the vehicle empty on the same day and on the same scales, in order to determine the true net weight of the load of coal or coke. Any person who violates any provision of this section shall be fined not more than two hundred dollars or imprisoned not more than six months or both.