Each was built to order, I still have the brochure gun, fortunately!
They are more in demand now than when I was building them.
Written up in 1986 Gun Digest and on the cover of Feb. 1986 Muzzle Blasts.

Your gun has the look of the flintlock era as for hardware, pineapple finial. Does the breech or lock show any signs of conversion?
Lovely engraving, my favorite style and coverage!
I do greatly enjoy the subtlety of the octagon to round transition...