Section 708(ii) in Police Regulations, Bengal , 1943
(ii)For journey by road, the bags may be packed in treasure tumbrils, or in large chests placed in carts at the door of the treasury in the presence of the Treasury officer; for journeys by railway or boat or (if convenient) by road, they shall be packed in stout boxes capable of containing Rs. 4,000 to Rs. 6,000 each, screwed and bound with iron without gunny covering or ropes, and the hoops should be riveted together where they cross; every box shall have the name of the treasury of despatch cut into or painted on it with a number.
