Helvetica Neue T1 55 Roman Exclusive Work

(Roman/Regular). The first digit indicates weight (5 is regular), and the second indicates width/position (5 is roman). Exclusive:

means:

If you take a standard OpenType Helvetica Neue and compare it side-by-side with the T1 Exclusive version, a trained eye will notice subtle but important differences. helvetica neue t1 55 roman exclusive

family, a refined 1983 reworking of the original 1957 Helvetica. The "T1" designation refers to PostScript Type 1 (Roman/Regular)