The Apple Desktop Bus Mouse II transformed the angular blocky designs to a curved teardrop shape. This basic shape is still used in mouse designs today by Apple and others. This mouse was included with Macintosh computers from 1993–1998 when the original iMac was introduced.
The Apple Desktop Bus Mouse II matched the platinum gray color of Macintosh computers at the time. However, a black version of this mouse was included with the Macintosh TV and the Performa 5420 (sold only in Europe and Asia).
Four different variations of the Apple Desktop Bus II Mouse are in my collection. The three platinum gray color versions have different color trackballs, and one has no label (with the product numbers cast directly into the plastic). The fourth example is the black Apple Desktop Bus II Mouse included with the Macintosh TV.