Pocket Positive  
Year Serial Number
1905 30000
1906 30200
1907 34700
1908 40800
1909 44500
1910 48200
1911 51500
1912 55000
1913 61000
1914 67000
1915 72500
1916 74500
1917 79000
1918 84000
1919 85000
1920 88000
1921 100000
1922 105000
1923 110500
1924 115000
1925 116000
1926 122500
1927 127000
1928 130000
1929 138000
1930 149000
1931 150000
1932 150500
1933 151000
1934 152000
1935 154000
1936 154700
1937 155000
1938 157000
1939 157800
1940 159000