50 Piso Without horizontal bars

The "without horizontal bars" designation refers to a security feature modification mid-series — certain printings omitted the horizontal bar elements that appeared on related issues, a distinction that matters primarily to variety collectors tracking the BSP's incremental security upgrades across the New Generation Currency series launched in 2010.

The abacá fiber content is worth noting: the Philippines is the world's dominant producer of abacá, and its incorporation into the substrate is both a practical sourcing decision and a deliberate nod to a domestic industry. The text revision from "Leyte Landing" to "Leyte Landing October 1944" appearing on Duterte-era Espenilla signature printings — apparently unlisted in the standard Pick catalog — is the kind of quiet typographic change that goes unrecorded for years before collectors notice.