Philippine fifty peso note

• 1852: Banco Español Filipino De Isabel II (present-day BPI) issued notes, features María Isabel Luisa de Borbón y Borbón-Dos Sicilias.
• 1916-1920: PNB issued notes. This note is never officially issued by the Philippine National Bank. 10,000 pieces were captured and issued during World War II by the Japanese. The others were looted by Moros in the Province of Mindanao who sold them at tenth of their face value.
• 1937: Philippine Commonwealth issued treasury certificate. Features the portrait of Henry Ware Lawton. This series were later overprinted with the word "VICTORY" after the liberation of the Philippines under Japanese rule in 1944.

Osmeña first appeared on the fifty peso note upon the release of the Pilipino series notes in 1967.

Features the portrait of Antonio Luna, a general in the Philippine–American War. The reverse features a painting of his brother, Juan Luna, Blood Compact between Spanish explorer Miguel López de Legazpi and Datu Sikatuna, the chieftain of Bohol.

In 1967, Sergio Osmeña replaced the portrait of Luna. The note is now predominantly red in color. On the reverse, it now features the Old Legislative Building. The design of the obverse was later revised, switching the positions of the "50" on the lower right corner with the Central Bank logo on the upper right, the signature of the Central Bank Governor was placed beside the signature of the President of the Philippines, the font for Republika ng Pilipinas was also changed and the text Limampung Piso was made into one line. This design was later used when the Bagong Lipunan series was released in 1973.

In 1973, the "Ang Bagong Lipunan" text was added and was overprinted on the watermark area.

In 1987, the bill was completely redesigned and new elements regarding Osmeña's achievement as the first Speaker of the Philippine Assembly, a precursor of the current House of Representatives were shown on the right side, namely, the mace and the gavel, the symbols used by the Philippine Congress. Also on the right side is the Fuente Osmeña located in Cebu City, Osmeña's birthplace. The reverse side featured the Old Legislative Building, the home to various legislative bodies of the Philippine government.

After the creation of the "Bangko Sentral ng Pilipinas" in 1993, its new logo was incorporated on all the New Design series bills.

In 1998, the year of printing was added at the bottom of the denomination value located at the upper left corner of the obverse.

In 1999, the names of the signatories on the bills were added starting with banknotes featuring the signature of President Joseph Estrada.

In 2001, starting with banknotes featuring the signature of President Gloria Macapagal-Arroyo, the name of the Old Legislative Building on the reverse side was changed to the "National Museum" (Gusali ng Pambansang Museo), to reflect the turnover made by the Congress of the Philippines to the National Museum. Also, the serial number was moved at the top of the denomination that was located on the lower left side of the banknote.

In 2010, the portrait of Sergio Osmeña was revised, a picture of the first Philippine Assembly and Osmeña and General Douglas MacArthur's landing in Leyte was added on the lower left corner and bottom center of the note respectively. The reverse now features the Taal Lake and the giant trevally.[3]

In 2017, an updated version of the New Generation series 50 piso banknote was issued with changes in the font size of the year of issue and the italicization of the scientific name on the reverse side. The text "October 1944" was added after the word "Leyte Landing" on the obverse.[4]

• 
  English series ₱50 note.
• 
  Pilipino series ₱50 note (1st version).
• 
  Ang Bagong Lipunan series ₱50 note.
• 
  New Design/BSP series ₱50 note.