This is a brass ruler from Traveler's Company, sold exclusively at the Chichu Art Museum. The material's texture changes over time with use, making it a unique and irreplaceable tool. One side is slightly raised to make it easier to draw lines with fountain pens and water-based ballpoint pens. If rust appears, you can restore its original shine by polishing it with a metal polish. \Bonus/ ・Museum guide leaflet ・Postcard (with a survey on the back) Chichu Art Museum × TRAVELER’S COMPANY