I have a Simplex Super LJ front derailleur for sale or trade. Very clean, nice condition. I don't know much about these, but looks to be for a triple. If you have any questions, let me know and I'll try to answer. Can send picture if needed.
I'd like to trade for Suntour Superbe front derailleur double, usable condition (for a rider) or an offtopic Shimano 53 tooth chainring (600 or DA). Will sell for $15.00 shipped if not interested in trade.
Drop me a line if interested.