Probably the easiest to recognize are the curved marks left by the circular saw, circa 1840. The vertical, crisp, uniform marks left by the band saw are not very deep.
Use your fingers on drawer bottoms or backboards of case furniture.
Up-and-down saws left vertical, crisp uniform marks and were used from 1700 to the 1860s.The use of square or oblong wooden pins that held in place by the shrinking of the wood was another joinery technique of that time. If you find a piece of furniture that seems to combine several styles, it is most probably not a period piece, but a later reproduction. Are all the parts original, or have there been replacements and repairs? Since wood is an organic material, it shrinks across the grain with age.Scalloped dovetails can be dated to the 1890s and were only used for a short time. You might think it's a modern material, but the Egyptian Pharaohs used laminated wood in furniture and it was used in England in the 1740s. You may not be able to see this with the naked eye, but if you measure a circular table top with the grain and then across the grain, there should be a difference if the table is an antique.Some sites require low monthly payments for full access to the site.Find the site that best suits your needs and provides the most access to others with disabilities.