Half Crown coins make very nice highly detailed Coin Rings, from Victorian coins all the way to 1967 all Half Crowns are very nicely designed coins, it is still possible to acquire Half Crown’s of a good grade at reasonable prices.
As is true of all British silver coins up until 1919 Half Crown coins were struck from .925 sterling silver. After 1919 the silver content was reduced to 50% the balance being made up of mainly copper. From 1947 all Half Crowns are made from Cupro-Nickel until Decimalisation.
Half Crown Coin Rings can be sized from about UK R. up to Y.
People who have a Nickel allergy should avoid Half Crown coins manufactured after 1947.