In addition to black hard rubber [[Dunn]] produced also bakelite pens with a transparent barrel (though most of the transparent models were later made in celluloid). Are also known to exists, but to be very rare, some metal [[overlay]] pens. | In addition to black hard rubber [[Dunn]] produced also bakelite pens with a transparent barrel (though most of the transparent models were later made in celluloid). Are also known to exists, but to be very rare, some metal [[overlay]] pens. |