The nails holding the drawer together on the sides and the bottom all have square heads. The nail heads do not appear to be uniform, so I'm guessing they are pre-1840 (because, from what I remember, after 1840, squarehead nails were machine made).
Although these could be machine made and simply worn on their edges - and as we are not going to take this drawer apart to see an entire nail, we cannot say for certain they are handmade. The finger joints on the corners, which I see are often referred to by other sellers as "dovetails" do appear to be handmade (hand cut). The cast iron bowl for the grinder looks to be in good shape except for some wear on the inside and a slight chip on the outer edge on the bottom. This should have no effect on the ability of this machine to function. Other clues to the age of this device can be gleaned from the design of the handle, as well as the bottom of the bowl.
We are not experts, and we are only trying to give you as much information as possible. This grinder seems to be mechanically functional; however, we have not tested it with actual coffee. The drawer does have a small split in the back section on the bottom. You can also see the remnants of some advertising on the inside of the drawer.The grinder mechanism is the only thing that was not removed for basic cleaning. It appears that a roundhead nail was, at some point, knocked into the wood to keep the mechanism from being twisted out. If you look at the pictures carefully, you'll see that.
The wing nuts also appear to be custom-made pieces. They do not look like machine-made nuts, and this is clear from the unevenness of the wings themselves as well as the off-center positions of the holes. This is to protect the wood where the bowl is screwed in from any stress that might occur during the transport process.
The item "ANTIQUE VTG WOOD COFFEE GRINDER MILL CAST IRON HANDLE Square Nails Finger Joints" is in sale since Thursday, April 20, 2017. This item is in the category "Collectibles\Kitchen & Home\Kitchenware\Small Appliances\Coffee Grinders, Mills".The seller is "zfr207" and is located in Angelica, New York. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, South Korea, Indonesia, Taiwan, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Israel, Mexico, New Zealand, Philippines, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Chile, Colombia, Costa rica, Dominican republic, Panama, Trinidad and tobago, Guatemala, El salvador, Honduras, Jamaica.