I know what you mean but i know i have devalued it to almost nothing but on the plus side the coins are now in an oblong case and match the rest as i collect sets of every five years 1970, 1975, 1980, 1985, 1990, 1995, 2000, 2005, 2010 and 2015.
I also collect queen Victoria coins, 50p coins, £1 coins and £2 coins and yes i know that sounds strange.