A shatter-proof rectangular box made for a diamond jubilee weighing ceremony. The box contains a handwritten note with the following information. 'The last product of Vale Hall Works Kilburn N.W. "HN and B Plastics", but this time on the orders of HM Foreign Office, for 50 shatter-proof caskets (actually 51 were made) to a design by H.L.N. to contain some 250 lbs. of diamonds for a diamond jubilee weighing ceremony, 1885-1945, of the Aga Khan. The base is of two thicknesses of black CP3 Delaron paper laminate. The top and side-wrapper are of 5/16" perspex, (bonded with an Ether solvent) and heat formed and finally cutter-moulded. The diamonds were inserted through a filler plughole PK2 screwed and end plugged, as well as a catalyst-hardened adhesive. The diamonds were mostly uncut industrial grade, with a sparkler here and there. Access(?) was by cutting a groove with a horizontal miller into a pre-cut groove. The 50 boxes were then sold for charity as cigar boxes, this box was the spare No. 51.' The lid of the box is inscribed 'Aga Kahn Diamond Jubilee 1885 1945. The box also contains a hand drawn cut-away illustration of the construction of the box.