Wow, that's an oddball. I'd love to hear what it sounds like. Anyone know the port ratio? It looks like it's 9/12 port.
It is definitely a model 20. That looks exactly like the farmland siren that blew over some 15 years ago. B&M never made a dual head vertical siren. All of their vertical sirens were single head and from what I understand they were extremely small for a full sized siren.Allenorgan42099 wrote: ↑Mon Jul 16, 2018 8:02 pm
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