Glyptodont is one of MPC's originals, not
copied from a Marx mold. Marx never released a figure of a glyptodont.
Markings on tail:
Markings are un the underside of the tail.
Red Glyptodont pictured at right is numbered
7 on inside of hollow body cavity. The MPC logo also appears there (see photo below).
Below: A green glyptodont, un-numbered, and a picture
showing the hollow body from underneath.