At Britains conversion to decimal currency in February, 1971, the Sixpence had no new decimal equivalent coin, but was equal to 2.5 New Pence in the new currency.
The British Sixpence was last minted for general circulation in 1967.
From a coin collectors perspective, a Sixpence, depending on the year, condition and method of minting, could be worth anything from bullion value to several thousand pounds GBP.
Please note that since the Sixpence is part of a redundant or obsolete currency, it no longer has an "exchange rate" with other currencies.
A sixpence was worth 1/40 of a pound so it would be worth about $.04. (1/40 of $1.61)
16.5 pence
Under pre-decimal currency in the UK, a shilling was worth twelve pence, and a sixpence worth six pence. The UK adopted decimal currency in 1971.
Good luck if you have one, but the last British Sixpence was minted in 1967.
The U.S. didn't exist in 1700.
$1.50
2.5 pence
As exchange rates stand today, £1700 (GBP) is worth roughly $3375 (CAD).
No U.S. Nickels are dated 1700. The first nickel was issued in 1866.
$1700
about 5,000 dollars
1 penny