Anyone have any idea who this seller is/ever heard of this guy? He says "I was on the design team that built the model 19, we used the bass tuning of this cabinet"....... I'm very skeptical of this ad for many reasons--for example, why would the Model 19 prototypes have 16 ohm Valencia 846A components? Wouldn't you think they would have 416-8B's in them? Hmmmm.....

Vintage Altec Prototype Model 19's no reserve | eBay

While you're at it, check out this prototype of the Altec Mantaray Horn (see photo #4)

1994 Altec Model WD540D Chipper | eBay