Production prototype of the Colt Series '70 MkIV .45 acp. Is technically a "pre-70" but fitted with the "Accurizer" collet bushing like '70 Series. Serialized as such on barrel and frame "BB." Is a recognized C&R gun by BATF so can ship to 03 FFL, and needs to be recorded in bound book if purchased by 03 FFL holder. 98% or more original blue, scratch on r. frame aft of grip, minor wear on some high points. Has period correct Colt Sandblast Walnut grips, Wilson tall sights but no alteration to sights on frame. $1700 ftf Seattle eastside area. $50 shipped.