Thank you for viewing. This is a Montblanc NO'285 hammer-trigger ballpoint pen, a popular model among enthusiasts. It was manufactured from the 1950s to the 1980s. The black resin has fine woodgrain-like hairline engravings, giving it the look and feel of real wood. Currently, ink refills specifically for this hammer-trigger pen are not sold. It can be used by attaching an adapter to current ink refills. Some stationery stores have adapters. Please consider this if you can obtain an adapter yourself.