Silas Hurry has put the poster "Telling Time in the Twentieth Century" on
the Council for Northeast Historical Archaeology web site along with
information on how to order a copy. The heavily laminated poster has dates
for fifty commonly occurring artifact types dating from 1900 to 1975 along
with some illustrations.
http://www.smcm.edu/Academics/soan/cneha/george%20poster1.html
Peace,
George L. Miller
URS Corporation
561 Cedar Lane
Florence, New Jersey 08518