More Steam Whistles

The other large diameter steam whistles in my collection. Pictured first is a "5 diameter whistle made by Penberthy. It is a single chime. I like the low mount built in valve on this one. The second photo is a mystery as to the maker. It too is a 5" but is a 3 chime and void of any markings. Many times the shape of the acorn nut on top can help i.d. whistle manufacturers as well as the shape of the chime cutouts. But this one is still unknown to me, and others who looked at it.