The Zenith 18.28.1.P.E watch movement is part of a series of movements that includes the 900, 902, 903, 927-929, 941, and 968. While the specific differences between these movements are not known, it is likely that they only differ in bridge designs. The Zenith 18.28.1.P.E movement is a manual wind movement that features a sub second function. It was used in watches produced around the 1950s.
The Zenith 18.28.1.P.E features the following functions: