Observatory LTD Address: No 05, Nguyen Tat Thanh Street, Ward 12, District 4, Ho Chi Minh City Enterprise code: 0312471491 Phone: 02839259415 Representative: Pham Dieu Quyen Adress: P101, D9, Phuong Mai Ward, Dong Da District, Ha Noi City Ward 12, District 4, Ho Chi Minh CityFounding date: 23 - 9 - 2013