Vintage Justrite Two Sided Metal Stamper - 728 $40 or $35 w/offer

This vintage Justrite two sided metal stamper is from the 1980s. It was used to seal documents. This particular one I could not find available online. I just found a few of the smaller versions of this gadget. It has a stamp in it that I can not easily take a photo of but it is of the NATC organization and apparently verified a person’s membership. The rubber stamp part could perhaps be replaced. I would think a specialty stationary store would know how. The stamper is in excellent condition except for being dusty. Don’t bundle If you know what NATC stands for, please respond to this listing.