Large cut on bubbled crystal heel

2705 - 1st part of the twentieth century, apparently unsigned, this exceptional large cut on heel in bubbled crystal quite in the taste of schneider or daum in good condition. - Schneider ou Daum ? No cracks or splinters. Very strong crystal sound. Unique piece of art glassware, very heavy (5070 g) for 340 mm in diameter and 125 mm high. Very, very neat and followed expedition.