Talk:ALCO DL420

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This is the 251 engine prototype, it preceeded the S-5 by three years. You can link it to the S-5 but don't call it an S-5 prototype, call it the 251 engine prototype because that is what it was. --SSW9389 (talk) 11:33, 15 June 2008 (UTC)

ALCO Demonstrator #909 the DL421 was the S-5 prototype. --SSW9389 (talk) 17:09, 22 June 2008 (UTC)

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