The characters are easily identified, because the mei on the tsuba is exactly written on the paper on the right. However, the mei is rather strange to me and I know little about tsuba. So, I am unsure if it is a reasonable mei or not. And I might be totally wrong about the translation of the mei.
motif:
幔幕松図 = picture of curtain and pine tree
鉄地金赤銅象嵌 = iron ground, inlay with gold and shakudo
mei:
日本第一家正阿弥元祖 = originator of Shoami which is the No. 1 family in Japan
宗圓的傳孫三和軒我独 = Sanwaken Gadoku (三和軒我独) who is thought to be a descendant of Soen (宗圓)
period:
江戸後期 = late Edo