--- In STMFC@..., Richard Hendrickson <rhendrickson@...> wrote:
...Superior doors continued to be produced through the '40s, and 5 and 6 panel configurations were introduced in the 1950s. They were eventually rendered obsolete by the development of sliding plug doors in the late '50s and early '60s.
Richard Hendrickson
Superior also entered the plug door business during the mid fifties, their products are shown in the '57 CBC IIRC (it's at work), and continued making plug doors at least into the early sixties. I seem to recall the flush plug doors with four operating rods are Superior products.
