Same dime. Same milk. Sixty years apart. The dollar didn't keep up — the silver did.
In 1964, a gallon of milk cost about 95¢. A roll of dimes paid for it — and one of those dimes was 90% silver, weighing 0.07234 troy ounces.
That same dime today, if you melted it, contains real silver worth several dollars. Walk into any store, and that silver buys you milk, eggs, gas. Not because milk got cheap — because the dollar didn't.
The Federal Reserve removed silver from circulating dimes in 1965. Anything dated 1964 or earlier is the last of the real money. It still works.