Here is B00098 and it is shown with what Harry had envisioned the "B" series to be.  

Grossman made less that 10, and probably only 6, of the 10 1/2" Bull Silhouette barrels and Harry told him to stop as the cost was too high to sell.  They also would be available with a standard 6 1/2" VR barrel and an 8 1/2" VR 357 barrel.  I bought this set from a gunshop in El Monte and a gentleman came in with all these pieces for sale.  That is all I know about it.  It looks unfired.

I looked the Pasadena up and that is not factory I'm pretty sure.  It looks like it was done with a laser engraver.

Here is how the uppers were factory marked.

John  -  Yes that is one of the 10 1/2" Silhouette barrels.  It looks like it was kept underground for safe keeping.

I wonder what kind of shape the bore is in.

I do not remember who told me that there were only six made but Bert Mason quotes Grossman in his book that he remembers that there were less than 10 made.