If there was a forty-year limit in the time prior to the 1960s, it was
widely violated. There are examples on many roads of cars with longer
lifetimes than that.

Tony Thompson Editor, Signature Press, Berkeley, CA
2942 Linden Ave., Berkeley, CA 94705 http://www.signaturepress.com
(510) 540-6538; fax, (510) 540-1937; e-mail, thompson@...
Publishers of books on railroads and on Western history