Rare 1912 button hook with Connemara marble shamrock on long chain

I was really excited to get a pair of these very dainty (2 inches long) button hooks made in Birmingham in 1912 and set with Connemara marble in a shamrock pattern. They were most likely for use with glove buttons and are beautifully engraved around the shamrock. I have put one on a 24 inch 1.5mm sterling silver curb chain and the other on a slightly heavier and longer 26 inch 1.7mm a sterling silver curb chain. This means the necklaces have different prices so please indicate which one you want when buying. Grandma’s Spoons jewellery is created from antique and vintage silver which will inevitably show signs of age. This is an intrinsic part of their charm. All items are in a presentation box and next day special delivery by Royal Mail is included in the price.