This is a drophead singer treadle sewing machine from around the 1930s. Sewing machines such as this could be hidden making it appear like a fancy hall table.
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SINGER Sewing & Embroidery Machines
1930 Singer Treadle Sewing Machine And Cabinet
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SINGER 4432FR / 230049112.FS / 230049112.FS Heavy Duty 4432 Sewing Machine - Refurbished
Singer Corporation - Wikipedia
Restoration of a 1930 Vintage Singer Model 101 Sewing Machine – Professionally Restored Vintage Fine Quality Sewing Machines
Singer Corporation - Wikipedia
Singer Corporation - Wikipedia
1930 Singer Sewing Machine