It's a 1970. I can only image what a boat anchor this bike was. I suspect it's all steel except for the stem, tubes, and tires. It's vintage.
However not all vintage things are not bad things, you can find some good buys on E-Bay, Craigs list, or other place if you know what to look for.
For example Suntour "Power Ratchet" shifters
So what gives these levers the POWER. It's the racheting wheel. Ahhh yes the days of Friction shifting, back in the day when people actually had to shift their bikes. The levers are designed so that when you pull back there isn't friction, all you feel is the tension of the derailleur spring. but the ratcheting wheel doesn't let the shifter shift down. Now in this respect it performs like a friction shifter.
I took mine apart to clean it and make sure nothing inside was broken.
An now re-assembled with smooth Phil Wood Grease for buttery smooth action. "Very Simple, Very Easy" (Does anybody in Kansas City remember "The Green Grocer".
Suntour's bar end shifter work on the same principle and were the king of bar end shifter for a long, long time. Suntour was not the only manufactures to make retro-friction levers.Simplex for one. If you were a fan of the Pro peleton in the late 80's a lot of pros dumped their Campy or Shimano lever for the ones you see on the very left). They are very nice . . . Who knew I'd ever praise a french manufactured component? . . . Oh and my love for Mafac brake calipers, but I'll save that for another day.
(Photo borrowed from Orange velo)
Notice the more compact and elegant designs.
I think Simplex went out of business and In the early 90's Mavic took over the design and sold it along with the Mavic component group. Campy would also make a retro-friction lever in the early 90's. Funny enough Shimano never did jump on that band wagon as far as I know. They went straight from friction to index in one swoop.
In my research to fins information on Simplex deraileurs and shifter I found this cool site on Old school derailleurs. Or are they so old I think you have to call them "Old World" shift levers.
Then visit his whole Site Tony Hadland's Links