The machine serial number is located on the knee casting. Standing in front of the machine, crank the Y axis handle to move the saddle to the rear of its travel. The sliding guards will move to the rear exposing the stamped number. Most serial numbers start with a "12/BR" which signifies a 12" Y axis travel, however, for earlier machines, pre 60's, the serial numbers start with "BR" which signifies a 9" travel. The numbers were started in 1938 with #1 and today are close to the 300,000 mark. The 50,000 mark was passed in the 1960's and the 200,000 mark in the 1970's. The 1980's and 1990's have brought the numbers close to the 300,000 mark. Along with the machine serial number each milling head is numbered. They are stamped on the main housing and also on a tag on the upper drive. These numbers are prefixed with the model of the head. The most common are "M", "J", "2J". The M model is a 1/2hp older head that was out of production sometime in the 1960's. The J head is a 1hp V-belt drive head that was the main work horse for many years. The 2J variable speed head was first introduced with a 1 1/2hp motor. This was later changed to a 2hp motor. The 2hp heads have a \2 at the end of the head serial number. The following is a breakdown of machine s/n's in relation to the dates manufactured.

Year                                       Serial Number

1938                       BH-1               thru               BH-39
1939                       BH-40             thru               BH-252
1940                       BH-253           thru               BH-656
1941                       BH-657           thru               BH-1549
1942                       BH-1550         thru               BH-2943
1943                       BH-2944         thru               BH-4105
1944                       BH-4106         thru               BH-4997
1945                       BH-4998         thru               BH-5930
1946                       BH-5931         thru               BH-7235
1947                       BH-7236         thru               BH-8814
1948                       BH-8815         thru               BH-10381
1949                       BH-10382       thru               BH-11378
1950                       BH-11379       thru               BH-12750
1951                       BH-12751       thru               BH-14489
1952                       BH-14490       thru               BH-16700
1953                       BH-16701       thru               BH-19367
1954                       BH-19368       thru               BH-22732
1955                       BH-22733       thru               BH-26962
1956                       BR-26963       thru               BR-31618
BH-30023 Last Round Arm          BR-30024 First Dovetail Overarm
1957                       BR-31619       thru               BR-37278
1958                       BR-37279       thru               BR-42110
1959                       BR-42111       thru               BR-46938
1960                       BR-46939       thru               BR-52598
1961                       BR-52599       thru               BR-58552
1962                       BR-58553       thru               BR-64987
1963                       BR-64988       thru               BR-71981
1964                       BR-71982       thru               BR-79538
1965                       BR-79539       thru               BR-88180
1966                       BR-88181       thru               BR-98089
1967                       BR-98090       thru               BR-108351
1968                       BR-108352     thru               BR-118640
1969                       BR-118641     thru               BR-131778
1970                       BR-131779     thru               BR-138639
1971                       BR-138640     thru               BR-143350
1972                       BR-143351     thru               BR-149294
1973                       BR-149295     thru               BR-157909
1974                       BR-157910     thru               BR-167652
1975                       BR-167653     thru               BR-174083
1976                       BR-174084     thru               BR-180697
1977                       BR-180698     thru               BR-188559
1978                       BR-188560     thru               BR-196987
1979                       BR-196988     thru               BR-206296
1980                       BR-206297     thru               BR-216473
1981                       BR-216474     thru               BR-227523
1982                       BR-227524     thru               BR-231827
1983                       BR-231828     thru               BR-236110
1984                       BR-236111     thru               BR-241350
1985                       BR-245351     thru               BR-245659
1986                       BR-245660     thru               BR-248551
1987                       BR-248552     thru               BR-250531
1988                       BR-250532     thru               BR-252874
1989                       BR-252875     thru               BR-255463
1990                       BR-255464     thru               BR-257888
1991                       BR-257889     thru               BR-259897
1992                       BR-259898     thru               BR-262187
1993                       BR-262188     thru               BR-264585
1994                       BR-264586     thru               BR-267603
1995                       BR-267604     thru               BR-271109
1996                       BR-271110     thru               BR-273843
1997                       BR-273844     thru               BR-276799
1998                       BR-276800     thru               BR-279106
1999                       BR-279107     thru               BR-280965
2000                       BR-280966     thru               BR-283022
2001                       BR-283023     thru               BR-284382
2002                       BR-284383     thru               BR-284978