Y-5 Odd Feature

[NW Mailing List]

I was re-reading my book Norfolk & Western Ry Steam Pictorial by Ben Bernhart and noticed something odd on Y-5 #2111 on page #65. There is something on and above the pilot on the engine's right side. It looks like a horn or something above but the lower part doesn't look familiar. Anyone know what it could be?
Thanks,Roger HuberDeer Creek Locomotive Works
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