ZL-1 Corvette Letter

[Mr70]

I cleaned out a Dealership recently and came across paperwork dated between 1968-75.One of the Zone letters dated Oct.24,1969 has a notice saying:CORVETTE:"St.louis Plant has a 1969 Corvette,(3000 miles)wth ZL-1 High Performance engine for sale at company car discount.Call Zone if you are interested".
Now I know they made 3 of these cars,and one was destroyed by Chevrolet.So of the two existing cars,one Yellow and one White,which would they be talking about.Any owners out there? I think the white one was in the Vintage collection.