Translations:Olo/7/en

These first pens were followed by Flat top models, very similar to Parker Duofold, also produced in two sizes and in black and colored celluloid. These pens are characterized by a rather large metal ring on the cap and the OLO logo engraved both on the body near the bottom of the pen and on the nib section. These models were created in parallel to the introduction of the Duplex for which can be considered the economic version.