Steam Siren 1/2" npt

[mtnman]

Selling a steam siren. It's 7 1/2' long, the horn is 2 1/2" and the thread is 1/2" npt . The only markings I can find is "tested" on the valve. It's the one Preston Services have. I had a hard time getting it to sound but a couple of emails with Micheal from Preston and it sounds now. I don't really have enough air and steam is a long way off. It's now on ebay. https://www.ebay.com/itm/263994739147?s ... 1555.l2649