Advertisement of Dah Chung Industrial Co. Ltd. The company was engaged in producing needles & pins, sewing accessories and nails & screws. Both of its main office and factory were located at Shau Kei Wan Road. 大中實業股份有限公司廣告。公司專營針類產品、縫紉配件、釘及螺絲等，其寫字樓及廠房均設於筲箕灣道。