Signs of Normal Wear. Another feature of genuine ABP (American Brilliant Period) glass hard to duplicate in new cut glass is normal wear.
If an item is said to be 100 years old it should logically show some evidence of that age. They should show wear not only on the base, but the internal bottom as well,
since even stationary pieces had to be cleaned or dusted on occassion. It is important to realize too that normal wear appears as lines of random width,
direction, depth, and length. Wear that is patterned in any way, circular or parallel lines, should ring warning bells.