This is a set of peg machines for mandolin made by Rubner of Germany. It is new and unused, but please refer to the images for the condition. The pegs use genuine ebony, giving them a luxurious feel. The body is gold-colored. I tried to attach them to a bowl-back classical mandolin, but the size didn't fit. They are for A-style flat mandolins, and it seems they can only be installed on a limited number of classical mandolin models. Please refer to the images for size details (quoted from the official HP). I purchased them about two years ago on sale for $125.4 (approximately 18,000 yen, including shipping). Reference: Official HP https://www.rubnertuners.com/mandolin-machines