Vintage Johann Becker Crystal Clutch

Vintage 1970's, gorgeous clutch or cross body bag covered in Swarvoski crystals, has a silver 21 " chain can hide in the bag when not using, has clear, purple and light blue color crystals on front and back. on the snap close bar on top has dark blue ( possibly sapphires) and clear. Inside is satin lined with the designers name, and 1 small open side pocket. New condition!