The Grand Prix has been running surprisingly well with the Suntour derailleur from my donor Raleigh Europa.
The derailleur works in reverse which is a bit disconcerting when swapping bikes and aesthetically the cage doesn't quite follow the chain ring to say the least.
So want to replace with an original plastic Simplex or a period Huret.
Haven't had a Huret front derailleur but had a rear Svelto BITD and can't remember how well it worked (or not work) but thought it may be a more durable option to the plastic bodied Simplex. Thoughts, suggestions and comments welcomed.