They are All signed on the inside of the cup "Clark". This pattern is not the rarest but to find it on a Punch Cup is rare. It is from the American brilliant period, (late 1800's to 1915) which is over 100 years old now!
I never sell other types of glass as ABP cut glass so you can be assured this is genuine. Condition: This is 100+ years old- (3) Have No chips or cracks and handles are as they were made without damage, and they are all clean and clear without nips or usage scratches. The other 1 cup has a chip in the rim so it is considered free, they are so rare you might want to display it as it is. This is for 2 reasons- We sell antiques / vintage goods, therefore they are used, I provide photos of the exact items and not stock pictures so you can always see the exact item you will get.