From the auction listing:
VICARI TO AUCTION MORE THAN 400 CLASSIC AND MUSCLE CARS
DURING BILOXI EVENT OCT. 12-13, 2012
HARVEY, La. - The Vicari Auction Company will offer more than 400 classic and muscle cars up for sale during their 16th annual Biloxi Auction, Oct. 12-13, 2012, at the Mississippi Coast Coliseum & Convention Center in Biloxi, Miss.
A range of collectible automobiles will cross the auction block, giving enthusiasts a variety of vehicles to suit their tastes. Among the cars Vicari will auction is a rare, numbers matching M Code 1969 Corvette, which features a prototype M coded engine block built by General Motors.
There are 12 total known M coded Corvettes, and this vehicle is one of only two known produced in 1969. This M39 coded Corvette has a 350 HP small block engine, power windows, power brakes, A/C and a tilt telescope steering wheel.
Click here for a PDF showing more history and details for this 1969 M-Code Corvette.