It is a stator from an American model 4600 V2 or 4600 V3.
The third coil is for the brake light.
The lighting coil is more powerful than a standard lighting coil, because it powers a large headlight (6 V 18 or 21 W), a large taillight, and a horn.
The flywheel is also different from the standard flywheel, and is more powerful.
You can read details about the 4600 V2 and V3 on my Velosolex 4600 website:
https://velosolex4600.blogspot.com/You can see videos of 4600 V2s and V3s on my Youtube channel:
https://www.youtube.com/c/BrianSolex4600 V2:
https://www.youtube.com/playlist?list=PLgAp0hMqCDUtlgpBwZRqpBW21GmWtTFPS4600 V3:
https://www.youtube.com/playlist?list=PLgAp0hMqCDUsXikDYK_Oy6nUCfQoGTzeTGreetings from NYC! Sorry for writing in English.