On30 Porter Prototype(s)?

[Flare]

I've always wondered which locos these two Porter models were based on, but now that I'm adding sound one I want to know which whistle is most prototypical.

I've found a few on Youtube that look REALLY similar to Bachmann's On30 offernings, but their whistles all sound different.

[ebtnut]

In general, whistles were the choice of the buyer.  In most cases with small locos like the Porter, they just ordered a "tweeter", a high single note sound, rather than a big chime whistle you would find on a big road loco.