Set of 2 Kho Liang le Model 440 Armchairs by C.A. Ruigrok 1960s

Beautiful set of 2 armchairs designed by Kho Liang le for C.A. Ruigrok in the 1960s as part of the Triangle series. Both chairs have skai upholstery with wenge wooden armrests. Both remain in good condition. One chair has an old repair on the backrest as shown on the photos.