10 Piso Seal type 4

The date range here spans three administrations and a political rupture. Notes bearing the Marcos & Fernandez signature combination predate the 1986 People Power Revolution; those signed by Aquino & Fernandez were transitional issues carrying Corazon Aquino's authority over a note that still bore design continuity with the Marcos-era series. The shift from black to red serial numbers under Aquino & Cuisia was a printing control measure, not a reissue — the same plates, a different press run.

Five distinct signature combinations across a single Pick number is unusual by any standard, and makes this an interesting series to work through sequentially.