Castline, Inc. seems to have started this line around January of 2008 and already they're making their mark in the world of diecast. I've read that each car will be released in limited numbers of around 4000 to 5000 pieces for each model/color. That means, when you see them, you'd better get them before they're gone! This, then, is the release order for the M2 Machines Auto-Thentics line so far. I will try to keep it updated as new ones are released. The cars in each series each have a different paint scheme and/or wheel combination. Updated February 3rd, 2011.
Release 1A:
1954 Chevrolet Bel Air
1955 Pontiac Star Chief
1953 Oldsmobile 98
1951 Ford Crestliner
1957 Ford Fairlane
1954 Mercury Sun Valley
Release 1B:
1954 Chevrolet Bel Air
1955 Pontiac Star Chief
1953 Oldsmobile 98
1951 Ford Crestliner
1957 Ford Fairlane
1954 Mercury Sun Valley
Release 2A:
1954 Chevrolet Bel Air
1955 Pontiac Star Chief
1953 Oldsmobile 98
1951 Ford Crestliner
1957 Ford Fairlane
1954 Mercury Sun Valley
1955 Pontiac Star Chief - Release 2A
Release 2B:
1954 Chevrolet Bel Air
1955 Pontiac Star Chief
1953 Oldsmobile 98
1951 Ford Crestliner
1957 Ford Fairlane
1954 Mercury Sun Valley
Release 3A:
1955 DeSoto Fireflite
1957 DeSoto Adventurer
1954 Dodge Coronet
1955 Dodge Royal Lancer
1953 Ford Crestline Victoria
1957 Chevrolet Bel Air
Release 3B:
1955 DeSoto Fireflite
1957 DeSoto Adventurer
1954 Dodge Coronet
1955 Dodge Royal Lancer
1953 Ford Crestline Victoria
1957 Chevrolet Bel Air
1953 Ford Crestline Victoria - Release 3B
Release 4A:
1955 DeSoto Fireflite
1955 Dodge Royal Lancer
1954 Chevrolet Bel Air
1954 Mercury Sun Valley
1957 Ford Fairlane
1957 Chevrolet Bel Air
1955 DeSoto Fireflite - Release 4A

1954 Chevrolet Bel Air - Release 4A
Release 4B:
1955 DeSoto Fireflite
1955 Dodge Royal Lancer
1954 Chevrolet Bel Air
1954 Mercury Sun Valley
1957 Ford Fairlane
1957 Chevrolet Bel Air
Release 5A:
1950 Oldsmobile 88
1949 Mercury
1959 Cadillac Series 62
1958 Plymouth Fury
1957 DeSoto Fireflite
1954 Dodge Coronet
Release 5B:
1950 Oldsmobile 88
1949 Mercury
1959 Cadillac Series 62
1958 Plymouth Belvedere
1957 DeSoto Fireflite
1954 Dodge Coronet
Release 6:
1959 Cadillac Series 62
1949 Mercury
1955 Pontiac Star Chief
1959 Cadillac Series 62
1949 Mercury
1955 Pontiac Star Chief
1955 Pontiac Star Chief - Release 6
1959 Cadillac Series 62 - Release 6

1949 Mercury - Release 6
Release 7:
1958 Plymouth Belvedere
1953 Ford Crestline Victoria
1954 Dodge Royal
1958 Plymouth Belvedere
1953 Ford Crestline Victoria
1954 Dodge Royal

1958 Plymouth Belvedere - Release 7
Release 8:
1949 Mercury
1955 DeSoto Fireflite
1957 Chevrolet Bel Air
1949 Mercury
1955 DeSoto Fireflite
1957 Chevrolet Bel Air
Release 9:
1954 Dodge Royal
1954 Dodge Royal
1955 Dodge Royal Lancer
1955 DeSoto Fireflite
1957 DeSoto Adventurer
1957 Chrysler 300C
1955 Dodge Royal Lancer - Release 9
Release 10 (Features cars pinstriped by Tom Kelly):
1950 Oldsmobile 88
1955 Dodge Royal Lancer
1951 Ford Cresliner
1957 Chevrolet Bel Air
1953 Ford Crestline Victoria
1957 DeSoto Adventurer
1957 DeSoto Adventurer - Release 10
I have several of these models, so as I get them photographed, I'll be sure to post more images so you can get an idea what these highly detailed models look like. Please feel free to let me know what you think of them.