Numerous manufacturers over many years, including today, have used the cut rim. A cut rim is often used when the item comes off the blowing iron or the punty rod from the top.
Mark doesn't say the Olive vases etc are Sklo Union. They are Borske Sklo, which wasn't part of the Sklo Union.
I also didn't say your vase wasn't moulded. It is; blow moulded but definitely not pressed. In general, something cannot be pressed if the top is narrower than the bottom because you can't pull the plunger out.