Brand New, Unused without Tags.  Note that there are some scratches on the face of the crown as this is old stock and can be seen in the pictures attached.

Genuine Longines Water Resistant Steel Crown Part Number 18-04.

Diameter = 4.5mm.  Thickness = 2.8mm.  Tube = 2.0mm. 

Tap = 0.90mm.

The Crown Has A Longines Logo On The Face.

Swiss Made.