Willem Einthoven and the Electrocardiogram – Dutch Stamp 1993

Dutch commemorative postage stamp issued in 1993, featuring Willem Einthoven, pioneer of electrocardiography and Nobel Prize laureate in Medicine (1924). The design combines a portrait of Einthoven with a stylized ECG waveform (P-Q-R-S-T), symbolizing his groundbreaking contribution to modern cardiology. A fine example of science-themed philately from the Netherlands.

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