German 15 pc Coffee Flatware 24k gold plated

Decore is the brand. In original box, was a gift to my mother-in-law from her mother-in-law on the occasion of her 25th wedding anniversary in the early 80s. I do not think it was every used They are 24 kt gold plated (the explanation in the box is it German but this is the translation) I don’t know the base material Excellent condition - see photos In original packing materials