how old is my violin?

Sounds like this was a factory-made instrument in the 1970s, and someone corrected the labels by hand because the decade had changed after the new year and new labels had not arrived yet. Either way, any violin less than 100 years old is not going to be worth any more than the quality of the materials used to make it. Your label is probably genuine since if someone were going to fake a label, it would make so much more sense to claim it were a well-known hand-made Italian or German model than a Japanese factory model. Real, natural wood is essential. Some violins are made of composite wood, and lately I've been seeing some newer composites that I could swear contain plastic shavings. Those are not worth their weight in firewood and would not even burn as well. Ebony or boxwood pegs and an ebony fingerboard are best. You might run into a few with a fingerboard painted black. You don't want a painted fingerboard. You want one that is naturally black. These are all things a luthier could look at.

Your German violin is probably a similar deal. You need to have your instruments inspected in person though. No one can tell from a description. They have to actually hold the instrument to know.

If it has wrinkles, it's probably in it's 80s.

well i dont know youve given no info