The barrel extends in the middle; the pen nib is attached to the slider and the pencil is advanced by twisting the upper and lower barrels. It is not marked but it is identical to a fluted barleycorn Mabies Patent combo in Deb Crosbies book (pages 61 and 189). There is no damage to the item; no dents or dings; all sliding pieces move smoothly. The nib is marked “Perry & Co. Glideaway New Metal Pen”. There are two cartouches and both are unused.