Vintage Mechanical Pencil with Pin Back and Retractable Chain

Dark green and silver tone pencil, attached to a retractable chain and pin back. Common among salespeople and office workers in the 1940s and 1950s. Belonged to my mom. Retractable chain could use some silicone to make it go in and out of the case more smoothly. Approx 5-1/2” from pencil point to round pin fob. Collectible condition, used. Back of fob is engraved with “Ketcham & McDougall East Orange, NJ”.