Old primitive looking chest of drawers

The only item my mother wanted from her GG's estate and, according to her, had already been in the family additional generations before GG's birth (1866).   The upper 5-chest drawers sit atop a separate 2-drawer base.  The wood is very thick and the sides, top, drawer bottom appear to be from single pieces of lumber.  The nails that are original look square and I took a close up of a nail head.  It never had drawer pulls.  Would much appreciate any observations about age or suggestions where to research.  I know it's kind of a ruin but am absolutely consumed with curiosity to see how it meshes with what I've heard of family history (mythology?).  The sides bear what appear to be decorative swirls.  Thanks -