St. Louis crystal vase carved to the wheel

When it comes to mastery. I have a nice example under the elbow. How many hours of work at the wheel. For this crystal vase of st louis circa 1920 in the shape of an eye rinse. It is a beautiful bb of 3.4 kg and it measures 25 cm long by 21 cm wide and 26 cm high. I've been doing the job for 30 years and i've rarely seen such a laborious and busy work on a piece of form.

Ref. : XTB72A7K