Two Shillings and Sixpence, or a Halfcrown, has been a part of the British currency for hundreds of years. I will assume that you mean a more recent year prior to the currency becoming redundant.
Two Shillings and Sixpence GBP in 1966 had the purchasing power of about £1.56 GBP today.
Two Shillings and Sixpence GBP in 1966 had the purchasing power of about €0.80 EUR today.
NOTE - This historical conversion is the result of many calculations and considerations by a purpose designed program for which I can take no credit. The resulting answer should only be regarded as an approximation.
As of today (01APR2011), 1 Euro is worth about 88 pence, or 0.88 pounds. One pound is worth about 1.13 Euro.
50 cents
As of today (01APR2011), $199 US Dollars is worth about 139.81 Euro.
As of today (01APR2011), 40 Euro is worth about $56.94 US Dollars.
Today - 30.12.2008 - 1 Euro is worth 1.413 US Dollars
Today, a euro is worth about $1.55.
As of today 43 Euro is worth about 54.61 US dollars.
As of today (01APR2011), One Botswanan Pula is worth about 0.11 Euro. One Euro is worth about 9.29 BWP.
As of today (01APR2011), 1 Euro is worth about 88 pence, or 0.88 pounds. One pound is worth about 1.13 Euro.
50 cents
As of today (01APR2011), $199 US Dollars is worth about 139.81 Euro.
As of today (01APR2011), 40 Euro is worth about $56.94 US Dollars.
As of today (02APR2011), 1 British Pound is worth about 1.324 Euro, and 1 Euro is worth about 0.8831 Pounds.
Today - 30.12.2008 - 1 Euro is worth 1.413 US Dollars
63.49 euro to find out the irish into euro /.787564
3666.33 EUR
The value of a 1975 Kenyan one shilling coin featuring the first president of Kenya in mint condition is 1.50 Euro, or 179.01 shillings. In good condition, the coin is worth 0.10 Euro, or 11.93 shillings.