Specifies requirements for spectacle frames made from cellulose acetate sheet, including basic dimensions and the use of a standard screw thread complying with BS 3172. The frame dimensions are required to be stated in accordance with BS 3199. Many of the requirements are of application also to spectacle frames made of other plastics materials.
Original price was: $264.16.$132.00Current price is: $132.00.
Specification for spectacle frames made of cellulose acetate
BSI Group , 03/19/1962
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