Antique blown glass beer mug turning purple

Antique glass beer mug is turning a lovely shade of purple. Exquisite mug. THICK glass and very heavy. Cut upper thumbprints and lower panels are highly polished and the glass has a wondeful feel to it. Thick applied blown handle and the bottom edges have been ground and polished too. Little specks of glass in the bottom that are original to when the mug was made. NO cracks, dings, scratches or cloudiness. Measures 4 1/4" tall. Simply gorgeous. I do not know who made it, but I know enough about glass to know it is very old and of superb quality. I have seen nothing compareable as far as glass beer mugs go. This is outstanding, and would make a very special addition to someone's collection or a very special gift.