The Riverside Maximus 0 size was produced in two models, the 1891 Model and the 1900 Model. 0 size watches were also made in the 1882 Model and 1907 Model, but not in the Riverside Maximus Grade. The 1882 Model 0 size is essentially identical to the 1 size 1882 model represented in this collection of small Walthams.

The 1900 Model was made in both a hunting case and an open face style. The 1891 Model was only made in hunting case.

These examples include 3 of the 1900 Model and 1 1891 Model.

These watches are often cased in beautiful heavy gold cases although 18K cases are scarce. One of these examples also has the hidden hinge feature that is even scarcer than the 18K case.