It is a machine made bottle so it is not any older than your estimate, but may in fact be newer.
This strikes me as much too whimsical a shape to be used in the chemist trade (pharmacist here in the US)
As with any unmarked bottle, the only hope of finding specific information is to locate a labeled example.
To say a machine made bottle is rare is rather absurd - no manufacturing plant tooled up to produce this item to make a dozen. Just because you cannot find one in an hour browsing the internet does not mean there are not thousands of others in existence!