Cast iron pieces made in the mid-1800s or earlier have distinct surface features on their undersides, such as a circular mark called a sprue on the oldest pieces, or a thin, long line called a gate mark on later ones. These marks disappeared as casting techniques improved, but cast iron pieces from the late 1800s and early 1900s can usually be dated by their trademarks and maker's marks.Know More
The rough markings on the bottoms of old cast iron objects indicate where the molten iron was poured into the mold. Most pieces made after 1875 have smooth undersides, because crafting methods changed so that the iron entered the mold on the sides, usually in two places. More recent cast iron may show heavy grinding marks on the sides to smooth out these rough entry points, but this grinding technique wouldn't be available to foundrymen before the mid-1800s.
Manufacturing techniques were perfected in the early 20th century, and pieces from between 1920 and 1940 are considered to be the highest quality. These examples often feature smooth, glassy surfaces due to polishing methods that were introduced to production. Early 20th century cast iron pieces made by recognizable manufacturers, such as Wagner and Griswold, are highly collectible today.Learn more about Antiques
The most reliable way to tell if a vase is antique is to get an appraisal on it. A qualified appraiser is trained to look for signs that other people miss and will give the best estimate of its age and fair market value. A written appraisal from a professional appraiser is required to insure an antique for its fair market value, and it is the only way to tell the difference between an authentic item and a professionally made replica or forgery. If an appraisal cannot be obtained or is not wanted, thoroughly research the specific item to learn specific signs of its age and condition.Full Answer >
The value of an Ansonia clock varies depending on the age, make, condition and rarity of the clocks. Most Ansonia clocks sell at auction for between a few hundred and a few thousand dollars, but some may be worth much more or much less.Full Answer >
According to hobbyist website The Postcard Guy, there are a number of factors that can affect the value of an antique postcard, including age, condition, topic and rarity. According to Love to Know Antiques, there are many helpful price guides to help collectors price postcards, the most popular of which is "The Postcard Price Guide" by J.L. Mashburn. EBay is also useful to see what prices cards actually sell for.Full Answer >
Determine an antique phonograph's value by researching its age, condition and desirability. Generally, a phonograph that is older, in good to excellent shape, and highly sought after is worth more than other phonographs. What ultimately determines the value is how much someone is willing to pay.Full Answer >