A notable golden helmet is a mystical object from the collection of Jasper Winters. It is recounted as being a dangerous artifact by John Constantine.
At some point in time Jasper Winters acquired the helmet for unknown purposes, among other significant mystical artifacts. It was storaged in his millhouse.
Shortly after Winters died, the house went to his daughter Liv Aberdine, who was escorted to it by John Constantine. Liv noted the helmet and shortly handled it, before John warned her to put it down, before it could "put her down".
The helmet at the very least remained in the house through the remainder of 2014.
The mysterious helmet is implied to be a dangerous object, capable of putting a grown woman like Liv Aberdine down. John Constantine felt the need to warn her just after she picked it up.