We have a large red metal hanging "ashtray".  It is a hung open box which reads "Smokers Help Prevent Fires" and a box to distinguish cigarettes.  I'm not sure if this was in a park, industrial business, or commercial.  It is a neat old piece.  It measures about 9 1/2" x 6 1/4 x 2 1/2" for the box and about 8 1/2" across the sign x about 5 1/4" in H above the box.  It does show some age with surface rust, a bit of missing paint and scratching.  It may clean up a bit more as I wiped it down with a damp rag.

Large Ashtray Metal Smokers Help Prevent Fires Vintage Item