You might like to think about your question a little longer and then ask again.
I bought one yesterday for $275
$5 gold pieces minted from 1795 through 1829 were 25mm in diameter. $5 gold pieces minted from 1829 through 1834 were 23.8mm in diameter. $5 gold pieces minted from 1834 through 1866 were 22.5mm in diameter. $5 gold pieces minted from 1866 through 1929 were 21.6mm in diameter. $5 gold pieces minted from 1986 through 2009 were 16.5mm in diameter.
VICTORIA DEI GRATIA tells me who the queen is, it tells me nothing about the coin. Whatever the coin is, if it was minted in 1854, it was probably minted at the Royal Mint in London.
Size is the difference, but the exact diameter would depend greatly on the year, since the diameter varied from time to time. Guinea coins were first minted in 1663 and last minted in 1813. The British Guinea coin had a diameter of 24 to 26 mm. Half-Guinea coins were first minted in 1669 and last minted in 1813. The British Half-Guinea had a diameter of 20 to 21 mm.
There were no steel coins minted during Queen Victoria's reign.
Assuming you mean the width of the coin fitting across the slot, actually there are 7 U.S. coins which will drop through a 2 centimeter slot: (1) silver 3 cent coin minted 1851-1873: diameter 1.4 cm, (2) all dimes: diameter 1.8-1.9 cm, (3) all pennies minted since 1856: diameter of 1.9 cm, (4) gold one dollar coins minted 1849-1889: diameter 1.3-1.5 cm, (5) gold quarter eagle coin minted 1849-1929: diameter 1.8-2.0 cm. (6) nickel three cent coin minted 1865-1889: diameter 1.8 cm. (7) half dimes minted 1794-1873: diameter 1.6-1.7 cm.
If you refer to the pending marriage of Prince William and Kate Middleton, there may be some sort of a commemorative issued. The only recent Royal Wedding to have a commemorative coin minted was the marriage of Prince Charles to Lady Diana Spencer, and that possibly was only because Prince Charles was next in line for the Throne.
Have a closer look at your coin. Queen Victoria died in 1901. The last British Shilling was minted in 1966.
From 1982 to 2009, the mintage of Bailiwick of Jersey coins is as follows - Year Mintage 1982 200,000 1983 400,000 1984 250,000 1986 100,000 1987 100,000 1989 100,000 1990 150,000 1997 600,000 1998 900,000 2002 975,500 2003 10,000 2005 500,000 2006 500,000 2007 780,000 2009 1,500,000
The diameter is 21.2 mm, so the radius would be 10.6.
A Double Sovereign is a gold coin of Two Pounds face value. During Queen Victoria's reign, they were only issued in 1887 and 1893 and were minted to a standard 16 grams and 28 mm in diameter.
There was no 1886 British Two Pound coin minted. During the reign of Queen Victoria, they were only minted in 1887 and 1893.