At replacements it list them as being made between 1977 - 1979, Mikasa is a big name to collectors espically their Crystal line. However Mikasa is still a big name, and lots of this stuff around. As for are they worth anything, yes but you have to find the buyer who need them to complete the set. Personnally you may want to think about watching Ebay and finding a Tea Pot and either have a complete set, but could be worth a bit more. I would say a full set would get you $50.00 to $75.00, That is not really much, The collectors and buyer are mostly looking for Fancy or Extra Fancy set, and want at least Mid century in age. But would still love to see a pic of them, but I vote for looking for a Tea Pot and keep it in the family.