To determine the value and age of your Metal Masters MFG Company dining chairs, there are a few steps you can take: Research: Start by doing some research online. This can help you determine when the chairs were likely made and how they fit into the company's product line. Examination: Look closely at the chairs to see if there are any identifying marks or labels that can give you more information about them. These may be located on the underside of the seat, on the backrest, or on the legs of the chair. Appraisal: Consider getting a professional appraisal of the chairs from an antique dealer or appraiser. They can give you a better idea of the chairs' value based on factors like their condition, age, rarity, and market demand. Online marketplaces: You can also search for similar chairs on online marketplaces like eBay or Etsy to see what they are selling for. This can give you a general idea of what people are willing to pay for chairs like yours. By combining these steps, you can get a better sense of the value and age of your Metal Masters MFG Company dining chairs. Aluminium extrusions are indeed a popular choice due to their unique properties. In addition to their lightweight and toughness, they offer other advantages such as corrosion resistance, electrical conductivity, and thermal conductivity.