I have one Colt preban lower receiver for sale. It has the old large hole instead of the newer pivot pin. I guess you'd call it an A1/earlier type. It does not have the magazine guard ridge, nor front pivot pin. I will enclose a adaptor pivot pin so you can attach a small hole upper - which I've been using for years. It is complete with all parts.
S/N is 163xxx
I'd call the lower 95-98%; I've bought it used in '93, and have shot it a lot.
It has an A2 pistol grip of the non-stowaway variety. It also has a J&P match trigger, but the match hammer/trigger springs are not installed. I will enclose them however.
I managed to lose the rear pivot pin detent spring, so I have a replacement on order, and will include it when shipped.
$375 + buyer pays shipping to his local FFL.