In 1937, the Commonwealth Arms were adapted to all circulating coinage. (Mint marks are M for Manila, D for Denver, S for San Francisco, and no mint mark for Philadelphia) Commonwealth Commemorative Issues English series In 1958, a new, entirely base metal coinage was introduced, consisting of bronze 1 centavo, brass 5 centavos and nickel-brass 10, 25 and 50 centavos. This series was demonetized after August 31, 1979, except for the 10-centavo that was demonetized only after January 2, 1998. Pilipino series In 1967, the coinage was altered to reflect the use of Filipino names for the currency units. 1-piso coins were reintroduced in 1972. The series was demonetized after January 2, 1998. Ang Bagong Lipunan series In 1975, the Ang Bagong Lipunan (The New Society) series, was introduced with ₱5 coins included for this series. Cupro-nickel replaced nickel-brass that year. The series was demonetized after January 2, 1998. {|class="wikitable" style="font-size: 90%" |- ! colspan="11"| Ang Bagong Lipunan Series''' |- ! colspan="2" rowspan="2" |Image ! rowspan="3" |Face Value ! colspan="3" |Technical parameters ! colspan="3" |Description ! colspan="2" rowspan="2" |Year of |- ! rowspan="2" | Diameter ! rowspan="2" | Mass ! rowspan="2" | Composition ! rowspan="2" | Edge ! rowspan="2" | Obverse ! rowspan="2" | Reverse |- ! Obverse ! Reverse ! first minting ! demonetization |- | style="text-align:center; background:#fff;"| | | 1¢ | 16.5 mm (length of side of rounded square shaped edge) | 1.22 g | Aluminum | Plain | State title, Lapulapu, value | "ANG BAGONG LIPUNAN," BSP logo, year of minting | March 31, 1975 | January 2, 1998 |- | style="text-align:center; "| | | 5¢ | 19 mm (8-pointed rounded scallop edge) | 2.40g | Brass | Plain | State title, Melchora Aquino, value | "ANG BAGONG LIPUNAN," BSP logo, year of minting | March 31, 1975 | January 2, 1998 |- | style="text-align:center; background:#fff;"| | | 10¢ | 17.5 mm | 2g | rowspan="3"| Cupro-Nickel | rowspan="3"| Reeded | State title, Francisco Baltazar, value | rowspan="2"| "ANG BAGONG LIPUNAN," BSP logo, year of minting | rowspan="4"| March 31, 1975 | rowspan="4"| January 2, 1998 |- | style="text-align:center; background:#fff;"| | | 25¢ | 21.0 mm | 4g | State title, Juan Luna, value |- | style="text-align:center; background:#fff;"| | | ₱1 | 29 mm | 9.5g | State title, José Rizal, value | "ANG BAGONG LIPUNAN," coat of arms with the scroll text altered to "ISANG BANSA,