Since the mid-1970s, headlights for the European market have evolved from a multi-part to a closed or sealed headlight. This was also the case from 1968 onwards for export models with the so-called Sealed Beam headlights.
With these sealed units, the Duplo or H4 lamp is held in the unit with a clamping ring or clamping bracket. If it gets lost or cannot be used for any other reason, you will need to buy a new one. Without the right clamping ring or holder, you cannot fix the bulb.
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