Vintage Korean Wooden Soroban Abacus

Found this old wooden abacus while stationed in South Korea. It's a traditional soroban style with the 1/4 bead configuration. It has Korean writing in it. Apparently it's a student's name. The wood has a nice dark patina to it and the beads still slide fine. Definitely has some age to it and shows some wear, but it's a cool piece for a desk or just to have as a decor item. Not sure exactly how old it is but it looks pretty vintage.