Nib: Fine gold plated Stylpoint nib.
Imperial I - The Imperial I is the oddball of the family. It is the only Sheaffer Touchdown pen that does not use a sac protector, opting to have the bulb shaped sac use the barrel of the pen for that purpose. The plunger is plastic, also unlike the usual metal tube plunger found on other Touchdown pens. The Imperial I is the sole Imperial fitted with an inset Stylpoint nib, similar to those found on certain cartridge pen models. It also has the thinnest cap band, a lip cover only 1/8 inch wide. Initially offered as a Touchdown pen only, cartridge versions exist, and were obviously made later