Circular No. 307/23/97-CX I am directed to refer to Sr. No. 162 of notification No. 4/97-Central Excise, dated the 1st March, 1997 and Sr. No. 124 of notification No. 5/97-Central Excise, dated the 1st March, 1997 and to say that whereas the former prescribes a rate of duty of 13% ad valorem for glassware produced by semi-automatic process in respect of goods falling under heading No. 70.07 to 70.15, the latter prescribes a duty of 8% ad valorem for all goods falling under sub-heading No. 7015.00.