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100 Piso Seal type 4
| Issuer | Bangko Sentral ng Pilipinas |
|---|---|
| Year | 1987-1993 |
| Type | Log in to see details |
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| Composition | Log in to see details |
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| Printer | Security Plant Complex of the BSP, Quezon City, Philippines (1978-date) |
| Designer(s) | Log in to see details |
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| Obverse description | Log in to see details |
|---|---|
| Obverse lettering | Log in to see details |
| Reverse description | Log in to see details |
| Reverse lettering | Log in to see details |
| Signature(s) | Aquino & Fernandez black serial # Aquino & Cuisia black serial # Aquino & Cuisia red serial # Ramos & Cuisia red serial # Ramos & Cuisia blue serial # |
| Protection type | Watermark |
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| Variants | Log in to see details |
| Comments |
The Seal type 4 designation marks a specific phase in the BSP's gradual redesign of its official seal during the Aquino and Ramos administrations — a bureaucratic detail that created a collector-distinguishable subtype within what is otherwise a long-running series. The transition from black to red to blue serial numbers across five signature combinations makes date-attributing individual notes surprisingly precise, given that the printed date range spans six years.
The Security Plant Complex has produced Philippine banknotes in-house since the late 1970s, one of the few central banks in Southeast Asia to maintain fully domestic production at this scale. The Ramos & Cuisia blue serial examples are the latest in the sequence and typically the easiest to source.