PARKER # 024 jointless , eyedropper , red and black mottled hard rubber . Note removable nib and section ( c. 1898 - 1905 ), PARKER # 023 hexagon barrel , jointless , eyedropper , black hard rubber ( c. 1898 - 1905 ), and PARKER # 020 , jointless, eyedropper , red and black mottled hard rubber ( c. 1898 - 1905 ).