Close-up of the unusual headlight / dynamo combination. Like everything else on this bike, it's over 40 years old and still works perfectly. Having said that, it's not very bright. Modern dynamo lights are far brighter, because LEDs make much more efficient use of the electricity from the dynamo.
https://todon.eu/system/media_attachments/files/113/509/276/134/194/921/original/2acc5542e0888cb2.jpeg