All US coins (including the Walking Liberty half dollar) minted by the US Mint since its founding in 1792 are still legal tender. (The Trade Dollar, produced between 1873 and 1885 and intended for trade in the Far East, was declared not legal tender in the US in 1876. That declaration was reversed in 1982 as part of a modification of the United States Code. As a practical matter, however, it would never be spent for face value in any case as it's silver value is far higher.)
500 dollars. These bills were withdrawn in 69 but still in circulation and still legal tender.
Yes, old Singapore currencies are still legal tender.
Sverige is Swedish for Sweden. Swedish coins would be legal tender in Sweden.
Yes, £1 notes are still legal tender in Scotland. They are still in circulation and still issued, although they aren't frequently used.
They are still legal tender.
No.
Depends if the currency it was drawn in is still legal tender. If the currency no longer exists then you won't be able to cash it.
No, pound notes are no longer legal tender in Scotland. They have been gradually replaced by pound coins and polymer banknotes. If you have any old pound notes, you can exchange them at a bank or post office.
The $50 Bill? Yes.
No.
Yes, it's still legal tender at face value. However, a bill that old would have additional value to a collector.
Still the running currency is called Lev