Huge vintage glass fishing buoy

Huge vintage glass fishing buoy. I would estimate that this old fishing buoy dates to the 1930s. It is green, and is covered with its original rope. I can see that it has age, as imperfections (bubbles) can be seen in the glass. It has a large pontil mark on the bottom. I can also see that it had been used on the ocean, as there are signs of sea life having affixed itself to the glass. It is large measuring about 38cm in diameter (about 122cm in circumference). It is in good condition - no cracks or breaks. Great display for your mancave.