LEAVITT & CO.

367 Washington Street  Boston

After July 1855, John B. Nichols was in partnership with Rufus Leavitt and the company name changed to Nichols, Leavitt & Co..

After July 1856 it was changed again to Leavitt & Co.

After July 1865 it was changed again to Leavitt Sewing Machine Co. .

By the 1870s, it was defunct.

The Nichols-Leavitt machines can be dated by their serial numbers approximately as follows:

Serial Number Year                        Company
1-28            up to July 1853                     Nichols & Bliss
29-245               " 1854      Nichols & Bliss  --   J. B. Nichols 
246-397             " 1855 J. B. Nichols & Co. --- Nichols, Leavitt & Co.
398-632             "  1856 Nichols, Leavitt & Co. --- Leavitt & Co. ?
633-827             " 1857                      Leavitt & Co.
828-902 1858  
903-1115 1859
1116-1436 1860
1437-1757 1861
1758-2077 1862
2078-2400 1863
2401-2900 1864
2901-3900 1865                               "
3901-4900          " 1866  Leavitt Sewing Machine Co.
4901-5951 1867
5952-6951 1868
6952-7722 1869
1857
1857