Some would argue that it (old age) is a state of mind.
We wolud help, but sadly, what is this "it"? we would help you but we don't know what the "it" is! Sorry!
Subtract the year you were born in from the current year. If you have had your birthday the answer is your age. if not, subtract one.
It will have bigger teeth or less teeth per inch and should have a wider set to the teeth.
You can't tell how old it is some glass bottles are made to look old and it could be fake