Inter-Island Broadcasting Corporation was established in October 1959 when DZTV Channel 13 in Manila went its test broadcast. On March 1, 1960 at 6:30pm, DZTV-TV 13 was finally launched and it became as the third television station in the country after the monopoly of DZAQ-TV of ABS and DZXL-TV of CBN owned by the Lopez family's Bolinao Electronics Corporation (now ABS-CBN Corporation). Its original location was at the corner of P. Guevara St. (formerly Little Baguio) in San Juan City from 1960 to 1978. American businessman Dick Baldwin was the station's first owner and programming consisted of mostly foreign programs from American television network CBS and a few local shows. Andrés Soriano, Sr. of San Miguel Corporation, would acquire the network in 1962. Soriano was also a majority owner of the Radio Mindanao Network (RMN) and "The Philippine Herald" newspaper. Soriano's combined media interests formed the first tri-media organization in the Philippines. As the television arm of the RMN, it partnered with the RMN radio stations for coverages of the general elections of 1969 and 1971. The station had relay transmitters to bring its programs to viewers in Cebu and Davao, with plans to open more in other cities.