unusual antique tintype photo women winding yarn / occupational seamstresses?

Original tintype, women in work aprons and bonnets, one seated, one standing. The standing one, who is wearing glasses, is holding a large spool (hank?) of yarn which the seated woman appears to be winding into a ball.

This 3.75" x 2.75" tintype has light surface wear, but otherwise is in excellent antique condition, with NO bends.

Shipping: Choice of First Class (flat photo mailer) or boxed Priority Mail.