This is a very rare item indeed! It's a glass Lucas battery filler bottle, probably made in the 1950s. In the days before maintenance-free batteries, you had to top up the water in your battery, and the Lucas filler bottle was designed to add just enough and not allow the water to overflow, by means of a special valve.
This one is in the original box. It has never been out of the box, which is still sealed from the factory. We have been very tempted to open it, but you might want it in sealed condition, so that is how this one is being offered.
We have several other Lucas battery filler bottles, including several other motorcycle type ones like this one. They are all in good used condition, and sell for $30-$40 each. Contact us if you'd like one.
or call 413-259-1722