I not sure of that model rod, but I would try 6 and 7 weight lines on it to see what makes it work. As far a who made these it could be these five: US Fiberlgass, St Croix, Shakespeare, Pedley, or South Bend - according to Vic Johnson's Fiberglass Fly Rods these were some of the primary OEM manufacturers.
Photos would be great if you have them.
Although I know very little about the reels, I have a few Langley fly reels and they're decent vintage reels- you can find them easily enough on ebay. The latch cover seen on many modern reels is a Langley patent. According to my friend Colby Sorrells, Zebco wanted langley for its spinning reel technology, but the De Liar is what made them money on the transaction. I need to Ask Colby about the rods as he is co-writing a book on Langley, and the completion date is nearing...