Number 9
5160 is just plain carbon steel and it is a rust magnet if you do not oil it.
The Frozen Monkey has spoken.
Also that is a new knife, it's not old, unlike most of the other pictures in this post.

Are antiques a new thing to these people?

there really is no reason why these "shouldn't" work. if there kept in good condition they should work 1000 years from now

The difference between now and then is that then they made stuff to last, now things are made to be disposable. Retailers don't want to sell you an item that will last for years, they want to keep you coming back to replace it as often as possible. Also, people took better care of their stuff back then. These days people trash everything.

I agree with Madge. Its whats called planned obsolescence. Items need to be repairable and have the right to repair.

This is why "domestic engineering" was invented, so that products would more or less just survive warranty time and then need repair or replacement. In the end you do not buy a fridge, you buy a users licence to use the fridge for x amount of time. The game is rigged. (of course there are exceptions, but they have exceptional price too).

No, its just that the cr#ppier items have long since ended up in the scrap heap. Every run of products will have some that just are either well cared for or struck it lucky during manufacturing.
Heard the same arguments in the 60s "they don't build stuff to last anymore|"