"The Pipe Organ was built in 1958 by the Flemish Organ-building Company Pels & Sohn (Bernhard Pels) and was erected by
Mr. Jose Loinaz of Manila and P. Andriessen of Holland. In 1979, re-leathering of the bellows of the pipe organ was done by
Javincello and Co, Inc. who also added the fourth manual in mid-1980s.." (Source: http://www.manilacathedral.org/ )