Sangamo/Schlumberger Watthour Meter Serial Log

Hat tip: The following information, designed to help people determine the manufacturing dates of their Sangamo Electric watthour meters, was provided by SangamonLink reader David Dahle. Our thanks to him.

Sangamo/Schlumberger watthour meter serial log

Year                      Serial Numbers             Description

1899                     1                                          Gutmann Type A
1900                     2001
1901                     4001
Nov. 1 1901         6001                                   Switchover to Gutmann Type B
1902                     9501
1903                     15201
Nov. 11 1903       29100                                 Final Gutmann Type B
1904                     29101 – 33000                 Type C mercury-motor meter
1905                     50000                                Type D (early) mercury-motor meter
Mar. 1 1906         55000                                Type D (late) mercury-motor meter
1907                     59001                                  Type E mercury-motor meter
1908                     71001                                  Type F mercury-motor meter
1909                     84001
1910                     100,001
Feb. 1 1911          115,001                               Type H singlephase AC meter
1912                     155,001                               Type H polyphase AC induction meter
1913                     185,501                               Type D-5 mercury-motor meter
200,000                                                          Type D-5 (3-wire) mercury-motor meter
1914                     270,501
Aug. 1 1914         330,000                              Type H2 singlephase AC meter
1915                     370,001                               Type MS (?)
1916                     446,001
1917                     601,666
1918                     770,001                               Type D-5 horizontal version supersedes vertical                                                                               version
1919                     992,815
1920                     1,213,001
1921                     1,472,894
1922                     1,800,435
1923                     2,194,454
1924                     2,633,703
1925                     3,026,674
1926                     3,428,717
1927                     3,892,941
1928                     4,476,016
1929                     4,827,200
1930                     5,082,908
1931                     5,435,720
1932                     5,690,131
1933                     5,815,053
1934                     5,844,328
1935                     6,467,326
1936                     6,966,946
1937                     7,297,909
1938                     8,125,349
1939                     8,380,383
1940                     9,107,173
1941                     10,255,808
1942                     10,682,819
1943                     10,813,462
1944                     10,823,883
1945                     10,939,790
1946                     11,245,703
1947                     11,817,616
1948                     12,575,682
1949                     13,654,650
1950                     14,785,260
1951                     15,755,883
1952                     16,587,528
1953                     17,312,275
1954                     17,977,769
1955                     19,666,001
1956                     20,763,926
1957                     21,441,643
1958                     22,207,116
1959                     22,918,159
1960                     23,478,586
1961                     24,365,977
1962                     25,567,691
1963                     27,001,807
1964                     28,000,000
1965                     29,200,000
1966                     30,000,000
1967                     31,000,000
1968                     32,000,000
1969                     33,000,000
1970                     34,000,000
1971                     34,150,000
1972                     38,501,081
1973                     39,000,000
1974                     40,500,000
1975                     44,000,000
1976                     45,500,000

The original Springfield, Illinois, plant closed at the end of 1976.

Sangamo and Schlumberger meters made at the “Oconee” (South Carolina) plant

1970                     35,000,000
1971                     36,000,000
1972                     37,075,000
1973                     39,200,000
1974                     41,000,000
1975                     42,600,000
1976                     44,500,000
1977                     46,000,000
1978                     47,500,000
1979                     49,250,000
1980                     54,000,000
1981                     57,000,000
1982                     60,000,000
1983                     62,000,000
1982                     60,000,000
1983                     62,000,000
1984                     66,000,000                        Last Type J4 meters made
1984                     68,000,000                        S series polyphase
1984                     68,500,000                        First Type J5 meters made
1985                     70,000,000                        J5 singlephase
1985                     72,800,000                        S polyphase
1986                     74,000,000                        J5 singlephase

More information: Watthourmeters.com

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2 Responses to Sangamo/Schlumberger Watthour Meter Serial Log

  1. Nancy says:

    Schlumberger rather than Schlumberter

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