2500 Dobras Hummingbird hologram

Issuer	Banco Central de São Tomé e Príncipe
Year	1998
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Value	2500 Dobras
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Obverse description	The national coat of arms of São Tomé and Príncipe occupies the central field, depicting a shield flanked by two sea eagles with spread wings, surmounted by a star and a black cockerel above the shield. Below the arms, the denomination '2500 DOBRAS' is inscribed in the lower field, with the date '1998' beneath it. The circular legend 'REPÚBLICA DEMOCRÁTICA DE S. TOMÉ E PRÍNCIPE' runs along the periphery. The design is rendered in high relief against a polished field, characteristic of proof-quality coinage.
Obverse script	Latin
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Reverse description	The reverse features a vibrant holographic insert centrally placed within the coin, depicting a hummingbird in iridescent blue and green tones in flight, approaching a large tropical flower rendered in teal and black. The hologram produces shifting color effects — predominantly greens and blues — depending on the viewing angle, a hallmark of the holographic technology applied to this commemorative issue. The surrounding border is plain gold, framing the holographic element without additional lettering or inscription.
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