First of all, this is an estate item from a man that collected lots of Harley Davidson.

With that said, I do not know if this is really a Harley item.  It has the flying bird enamel emblem on the front.

Marked DAZZLE 90 JAPAN as shown, and this brings up nothing in my research.

I think this is a lighter, it may be a light.

It has a black right hand corner that you push down with a click.

It has a screw that can be moved to H and L

It measures 1.25" by 2.25"

That is ALL I know about it.