Wood and leather armchairs

These chairs are a little over twenty years old and have been in my possession since 2011. - they were created by a cabinetmaker, whose name I do not have. - made of wood and leather - assembly requires no glue, no nails and no screws. Japanese method I think. - measurements: - 59.5 cm at the widest of the backrest - 57 cm outer armrest distance - 1 meter high.