IWC (International Watch Company Shaffhausen) Serial Numbers

Table of I.W.C movement and case serial numbers and their corresponding years of manufacture.

The serial number is located on the movement of each watch, either on the back or under the dial. The year of production of the case can lag up to 10 years behind from the year of production of the movement, because the assembly could have been made later from the stock of finished movements.

Movement Production Dates According to IWC Factory Records:

YEAR OF ISSUESERIAL NUMBER
1887-189028,251 – 49,300
1890-189528,251 – 49,300
1895-1900117,301 – 211,200
1900-1905211,201 – 321,300
1905-1910321,301 – 463,600
1910-1915463,601 – 620,800
1915-1920620,801 – 742,300
1920-1925742,301 – 807,400
1925-1930807,401 – 919,600
1930-1935919,601 – 940,000
1935-1940940,001 – 1,013,200
1940-19451,013,201 – 1,092,400
1945-19501,092,401 – 1,200,400
1950-19551,200,401 – 1,335,400
1955-19601,335 1,513,000
1960-19651,513,001 – 1,778,800
1965-19701,778,801 – 1,970,200
1970-19751,970,201 – 2,265,400

Case Production Dates According to IWC Factory Records:

YEAR OF ISSUESERIAL NUMBER
1880-18860 – 10,000
1886-189010,001 – 50,000
1890-1899100,000 – 200,000
1899-1903200,001 – 300,000
1903-1907300,001 – 400,000
1907-1913400,001 – 600,000
1913-1924600,001 – 800,000
1924-1929800,001 – 900,000
1929-1938900,001 – 1,000,000
1938-19451,000,001 – 1,100,000
1945-19601,100,001 – 1,500,000
1960-19721,500,001 – 2,000,000