It's definitely a nice one. However, according to the headlights it's a 304 not a 204. The 204 has symetrical, slightly rounded lights. It is very rare because only 18000 have been built and they tend to rust away. Mine ended its career in a light crash in 1984, despite disc brakes.
After some months living in London and seeing some of the most unbelievable cars and bizarre things-on-wheels, I have finally decided to keep track of this unique heritage.
Don't forget to check the archive for surprises.