According to the "Complete Service Manual for Lionel Trains," re-printed by K-Line in 1982, the 226 Boston & Maine Alco FA diesel engine was produced in 1960 in an A-B set with the powered A unit having two magnetic axles, a three-position reverse unit, and a horn. That would make it a pretty high-end Alco FA, since many of them were produced with far fewer features. You might want to remove the shell (single screw in the back of the engine) and check to see if you have a horn in the engine and verify that both axles on the power truck are magnetized.
There seems to be a lot of variation in Lionel's production in the 1960's as the company looked for economies in production and used stock (such as shells) on hand whenever possible rather than ordering or producing new stock.
SFDAN,
The pocket price guide by Greenberg's does not mention any color combination for the Alco A unit.
Maybe "envfocus" can help you on this.
Lee F.
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