brandnamepencils.com is a virtual museum to the humble pencil, featuring high quality images of over 7,000 mostly vintage pencils from every country, manufacturer, era, and graphite grade you can imagine. Artists pencils, pencils with plastic ferrules due to WW2 metal shortages, pencils with weird erasers, pencils with no erasers, yellow, black, red, green, pink, whatever. It's a wonderful look into a usually forgotten and utilitarian item.
They also sell extras from the collection, though I caution that vintage pencils are not a cheap market.