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I'm trying to find out a valuation for a 50 piece Kings and Queens of England Silver Medallion Collection, issued by the South African Historical Mint c1985; I can find plenty of info on a 43 piece collection, but not this particular 50 piece collection that runs from Elizabeth II right back to Edward the Martyr. General web searches have provided no information, and nor has the South African Historical Mint. Any help gratefully received!

I'm trying ro find out a vlauation for a set of Kings and Queens of England Silver medallion Collection of 50 coins (not the more usual 43) that were issued by the South African c 1985; I've contacted the South African Min and the South African Historical mint without any luck. I have uncovered loads of valuations for a 43 medallion set, but absolutely none that mention a 50 medallions set. The series runs from Edward the Martyr to Elizabeth II. If someone can point me in the right direction that would be hugely helpful