| Brand | Serial Number Transparency | Earliest Dated Record | |-------|----------------------------|------------------------| | | Excellent (full ledgers exist) | 1850 | | Seidel & Naumann | Fair (fragmented) | 1876 | | Pfaff | Good (partial ledgers) | 1862 | | Wheeler & Wilson | Good (US records) | 1854 |
: In 1951, the company merged with Clemens Müller AG. Later machines might be branded under the Global Industrial Sewing Machines! seidel and naumann sewing machine serial numbers