The ornamental design for an observationelevatorcab, as shown and described herein.
FIG. 1 is a view in perspective of an observation elevator cab according to
the invention, where the view is taken 45° to the right of front at
a level even with the center of the cab;
FIG. 2 is a side view of an observation elevator cab according to the
invention.
FIG. 3 is a frontal view of an observation elevator cab according to the
invention;
FIG. 4 is a bottom view of an observation elevator cab according to the
invention.
FIG. 5 is a top view of an observation elevator cab according to the
invention.