Depicts a portrait of Dénes Gábor, with his signature depicted at the bottom right. Below the signature, his birth and death dates are shown in two lines. On the left, the engraver's privy mark is visible.

Engraver: György Kiss

Depicts a colored, three-dimensional hologram on a 12.3 mm nickel disc. The hologram displays the initials of Dénes Gábor's name, with a laser beam in the background and pulsating concentric circles. The denomination is arranged in a semi-circle at the bottom. The country name (Hungarian Republic) is divided by the engraver's initials (FM) and mint mark (BP) on the left, while the year of issue is on the right side.

A hologram is a three-dimensional image formed by light interference from lasers or other coherent sources. Unlike traditional photos, holograms capture both light intensity and phase information, creating a fully three-dimensional image with depth and parallax. They're made by splitting a laser beam into object and reference beams, then recording their interference pattern on a photographic plate. To view a hologram, coherent light is shone onto the developed plate, reconstructing the original object beam's wavefronts and creating the illusion of a three-dimensional image.

Engraver: Mihály Fritz