380687650643 on eBay is an 'authentic' Alfred DeCourcy whistle. Selling as old and in great shape 🙂 That is interesting as the company sold out in 1927 !!!
281143036145 also is another 'authentic' whistle made by Auld of Glasgow….odd … they sold out by 1907 ???
261254977919 'vintage' copper and brass bosun whistle ( they are reproductions sold everyday on eBay )