This commemorative 25-cent stamp from the Netherlands celebrates 400 years of the Dutch national flag, issued in 1972. The design features a stylized flowing tricolor of red, white, and blue, rendered with a bold graphic curvature that symbolizes national pride and historical continuity. The fine typography and smooth gradient background give the issue a distinctly modern aesthetic typical of Dutch design in the 1970s. A meaningful item for collectors interested in vexillology, national anniversaries, and European commemoratives.