公司歷史
| 八月 1969 | 于靜深先生成立「啟東實業有限公司」位於大業街19號 |
| 四月 1974 | 搬往鴻圖道58號, 擁有2萬7仟平方呎 |
| 五月 1978 | 買入第一塊地, 佔地3萬2仟平方呎位於粉嶺, 以便將來發展 |
| 三月 1979 | 榮獲美國UL及加拿大CSA電線品質檢定證書, 包括UL1015, UL1007, 多芯軟電線, 及電線插頭 |
| 四月 1980 | 買入粉嶺另一塊地, 以便發展, 生產PVC膠粒及生產室內通訊電線佔地壹萬六千呎 |
| 十一月 1981 | 榮獲香港品質標誌(HKQ-MARK)證書定本廠所生產之BS6004電纜 |
| 四月 1984 | 成立啟東電線電纜有限公司 |
| 十月 1990 | 購入粉嶺電纜廠隔壁的地皮, 佔面積約12萬平方呎 |
| 一月 1991 | 正式與美國, 菲爾普斯.導奇簽合作與技術轉讓協議書 |
| 六月 1991 | 第一台8mm拉銅機條啟用 |
| 十二月 1993 | 榮獲英國特許電業測試局(BASEC)批核ISO9002國際品質系統證書 |
| 二月 1994 | 榮獲BASEC批核電纜品質標誌 |
| 三月 1994 | BASEC在香港舉行啟東頒證典禮 |
| 十一月 1995 | 東莞廠房正式建成 |
| 三月 1996 | 東莞廠投產 |
| 十二月 1996 | 東莞榮獲BASEC批核ISO9002國際品質系統證書 |
| 三月 1997 | 東莞榮獲BASEC批核電線品質標誌 |
| 2004年中 | 東莞廠東擴建100,000平方英尺中壓電纜廠房 |
| 2005年底 | 中壓電纜廠房投產並獲KEMA認證 |
| 十二月 2007 | 東莞榮獲中國質量認證中心ISO14001 環境管理系統證書 |
| 八月 2009 | 成功開發風力發電配套30KV橡膠電纜 |
| August 1969 | Founded Keystone Industrial Co., Ltd. By Mr. Ching-Sum Yu at 19 Ta Yip Street, Kowloon. |
| April 1974 | Moved to 59 Hung To Road, Total Factory Space 27,000 sq.ft. |
| May 1978 | Bought first piece of land, area 32,000 sq.ft. for Fanling future expansion (now note as Fanling Cable Factory) |
| March 1979 | Obtained license from UL and CSA tp produce appliance wire, radio-circuit wire, flexible card and power supply card set. |
| April 1980 | Bought second piece of land in Fanling established Fanling factor to produce PVC compound and telecommunication cable. Total floor area 16,000 sq.ft. |
| November 1981 | Obtained Hong Kong Q-Mark License for BS6004 power cable. |
| April 1984 | Established Keystone Electric Wire & Cable Co., Ltd. |
| October 1990 | Sign the letter of intent and agreement to purchase the adjacent land of Fanling Cable Factory Site to make the total land area to be approximately 120,000 sq.ft. |
| January 1991 | Sign Joint Venture and Technical Assistance Agreement with Phelps Dodge Corporation, USA. |
| June 1991 | Rod Breakdown Machine in operation in Fanling Cable Factory Site. |
| December 1993 | Awarded ISO 9002 Quality Management System by British approvals Service for Cables (BASEC) |
| February 1994 | Awarded Product Certificates in compliance to British Standards under Product Certification Scheme of BASEC |
| March 1994 | Official BASEC Certificates Presentation Ceremony |
| November 1995 | Dongguan Keystone Factory Building complete construction |
| March 1996 | Dongguan Keystone Factory commence production. |
| December 1996 | Dongguan Keystone was awarded ISO 9002 certification from BASEC, UK |
| March 1997 | Dongguan Keystone was awarded Productcertification from BASEC, UK |
| Mid 2004 | Dongguan Keystone was expand another 100,000squre feet for MV cable product |
| Late 2005 | The medium voltage cables were productedand performance validated by KEMA |
| December 2007 | Dongguan Keystone was awarded ISO 14001 certification from China Quality Certification Center. |
| August 2009 | 30KV Rubber Cable for winfarm was successfully manufactured |
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