A releasable mounting system that includes a mounting assembly and a
release assembly attached to a display assembly. The mounting assembly
includes a hub assembly having spokes that connect a wheel to the hub,
which is mounted to a trunnion. At the intersections of the spokes and
wheel are protrusions adapted to mate with corresponding detents arranged
radially about the trunnion and formed in a plate against which the hub
assembly is positioned. The release assembly includes a release attached
to a release plate, the release being movable relative to the plate. A
channel formed in the release receives the hub assembly and a hook
portion on the release holds the hub assembly in the release until
movement of the release causes it to release the hub assembly. The
display is pivotable about the trunnion in fixed stops defined by the
detents and is also releasable by operating the release.