48. (1) If any person, in the course of trade or commerce, uses, or causes to be used, sells, distributes, delivers or otherwise transfers, or causes to be sold, distributed, delivered or otherwise transferred, any false or unverified weight or measure, it shall be presumed, until the contrary is proved, that he had done so with the knowledge that the weight or measure was false or unverified weight or measure. (2) If any person makes or manufactures or has in his possession, custody or control any false or unverified weight or measure in such circumstances as to indicate that such weight or measure is likely to be used in the course of trade or commerce, it shall be presumed, until the contrary is proved, that such false or unverified weight or measure was made manufactured, possessed, held or controlled by such person with the knowledge that the same would be, or is intended to be, used in the course of trade or commerce.