This is a sword guard (tsuba) that my father collected a long time ago. It appears to have been hammered into shape, giving it an uneven surface. It hasn't been maintained, so there is rust. I don't know the material or the era it's from, so please judge from the photos. Size: 7.5 x 7.3 cm Weight: 100 grams Please understand that these are approximate values. Feel free to negotiate the price.