I have the Weaver E8's. They are ABA sets with no connecting wires. Both A units had motors and one A unit was set to start in reverse. I think that Mike and MTH may have worked with Weaver to bring them out originally. Also the 630's and the 625's. A footnote when Weaver issued the E8's they came out as a AA and a year or so later they did a B unit with no motors. The UP set I have the B unit is a shade of yellow different because of the time frame from when the A's were made..........Paul
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