Colonial master clock data sheet pdf 318kb.
Ibm wall clock history.
Please note that this serial numbering system ran through december 1949 ending with 999999 and was restarted the next month january 1950 at 10000.
T his serial numbering system ran through december 1949 ending with 999999 and was restarted the next month january 1950 at 10000.
Therefore using this system a clock with a serial number of say 145000 could have been manufactured in either 1917 or 1951.
International model 561 2dg self reg square wood school clock vtg 030720.
An increasing number of people collectors dealers customers individual owners and retired and current ibm employees want to know the age of their ibm clock or its value or how to repair and service it.
Vintage ibm international business machines wall clock school academy university.
The clock is a faithful reproduction of the classic ibm clocks found in offices warehouses and schools during the mid 20th century.
Engineering data sheet 680kb service instructions 839kb master clocks.
Simplex acquisition of ibm s clock business 58kb time equipment division history 101kb card recorders.
Judging from the volume of requests and inquiries we receive each year clocks are one of the most popular product lines in ibm s long history.
Antique 1939 international ibm wood wall clock with speaker 10 face nice.