Pocket Watch Database

Illinois Mason Production Charts

Note: Production dates are estimations but should be accurate within +/- 3 years.

[1872,1873,1874,1875,1876,1877,1878,1879,1880]
[1100,3000,4500,1100,100,500,99,99,102]


Illinois Watch Co. Mason Production Map Relative to Company Lifespan

Start of Production
End of Production


Grade Production Runs Lowest Highest Start End Profile Code/Image
Mason 10,600 19 101 47,300 1872 1880
10,300 16 101 47,200 1872 1880 18s-M1-7j-AGK-U-
100 101 200 1872
500 501 1,000 1872
1,000 4,001 5,000 1872 1873
1,000 8,001 9,000 1873
1,000 10,001 11,000 1873
1,000 12,001 13,000 1873 1874
1,000 15,001 16,000 1874
1,000 24,001 25,000 1874
1,000 28,001 29,000 1874
1,000 31,001 32,000 1875
1,000 33,001 34,000 1874
300 36,001 36,300 1875 1877
100 36,401 36,500 1877
100 36,601 36,700 1877
100 36,901 37,000 1877
100 47,101 47,200 1878 1880
300 3 44,601 47,300 1877 1880 18s-M2-7j-HGL-U-
100 44,601 44,700 1877
100 47,001 47,100 1878 1880
100 47,201 47,300 1878 1880