What was initially taken for a viewing window was, in the specific case, the golden nib-width sticker. The 146 has been available with an ink-view window since the 1980s; a 146 without a viewing window is in fact a 147 Traveller. The shape of the sticker has changed over time (in the 1970s small and round); at the same time, earlier the nib width was additionally engraved on the cap ring or at the cap end. A combination of sticker and 146 engraving at the cap end is unusual. Older 146s from the late 1980s have a viewing window without ribbing and a full-gold nib without platinum inlays.