| 1974 | Siam Motors Co., Ltd. became Thailand's sole distributor, installation and service agent for Hitachi elevators, escalators and moving sidewalks. |
| 1988 | Siam Motors Co., Ltd. established Siam Elevator Co., Ltd., (SEC) to solely distribute Hitachi elevators, escalators and moving sidewalks, and Machinery and Equipment Co., Ltd. (MECO) to solely install and service these products in Thailand. |
| 1992 | Siam Elevator Co., Ltd. and Machinery and Equipment Co., Ltd. in a joint venture with Hitachi (Japan) Ltd. established Siam-Hitachi Elevator Co., Ltd. (SHE) to solely manufacture install and distribute Hitachi elevators, escalators and moving sidewalks, and Bangkok-Hitachi Elevator Service Co., Ltd. (BHESCO) to solely install and service these products in Thailand under Siam Motors's holding 60% shares and Hitachi's holding 40% shares. |
| 2010 | Siam-Hitachi Elevator Co.,Ltd.(SHE) and Bangkok-Hitachi Elevator Service Co., Ltd. (BHESCO) have merged into one company and run the business under the name of Siam-Hitachi Elevator Co.,Ltd.(SHE). |
| 2015 | Hitachi, Ltd., together with Siam-Hitachi Elevator Co., Ltd.(SHE) and Prime Deco Engineering Co., Ltd. has established Hitachi Elevator (Myanmar) Co., Ltd., a joint venture for sales and services of elevators & escalators in the Republic of the Union of Myanmar ('Myanmar'). |
| 2016 | Hitachi, Ltd., together with Siam-Hitachi Elevator Co., Ltd.(SHE) and CMED Group Co., Ltd. has established Hitachi Elevator (Cambodia) Co., Ltd., a joint venture for sales and services of elevators & escalators in the Kingdom of Cambodia ('Cambodia'). |
| 2017 | Hitachi Elevator (Thailand) Co., Ltd. has been established by being separated from Siam-Hitachi Elevator Co.,Ltd.(SHE). |
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