GIGANTIC Illinois Central-Style "Riverboat" Three-Chime Steam Whistle. I believe it's IC, but I am not 100% certain. The casting number shown in the picture should facilitate verification. Whistle body is about 6 1/4" diameter, maybe 6 1/2". The distance from top of plywood to top of black cap on whistle is slightly over 24". There are no numbers cast on the other side of the valve/bowl.

I had a new center stem installed a year or two ago.

See the video of a similar, if not the same, model whistle shown below.

Prefer local pick-up, but I will ship to lower 48 with payment in advance for $100 crating + actual shipping cost. I may be willing to meet you halfway between where you are and Illinois.

Thanks for looking.