Hi
Bickells and Co is well known name here in South Africa. They are a very old Numismatic Dealer and have been putting together coin sets. The set you have is probably mint state. I believe they would hand pick the coin to put in sets so you probably got a very good set there. The 50c and 2.5c have particularly low mintages. At 25 pounds, I think you got a bargain. heres a set that sold recently on bidorbuy.
http://www.bidorbuy.co.za/item/82522481/THE_IDEAL_CHRISTMAS_GIFT_Who_was_born_in_1962_and_turned_50_years_old_this_year.html
