The 1914 and 1920 coins are from Great Britain and have nothing to do With New England. I can not give you a value for you did not say what denomination they were. A Buffalo nickel is not made of silver it just looks like silver. A dateless one can somethings be sold to a jeweler or a belt buckle maker for a quarter. The John Adams dollar has his name above the bust and 2nd President and dates 1797-1801 below the bust and it is a gold color, on the reverse is the Statue Of liberty and the $1 with United states of America around the top. If your item is not like this then it is a medal put out by anyone of a lot of companies. The dollar is worth a dollar and so is the medal. A 1949 cent had a large mintage and can be found in normal circulated grades for around 5 cents. I would need to know the denominations of the British coins to help you further. Not all old coins have high values.