Upvote:11
According to this site, the Bataan 2 is the plane pictured in the foreground, distinguishable by more (windows?) on the nose cone area.
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More info can be found at the Aviation History website.
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Upvote:15
The G6M1 were simply G4Ms reconfigured for transport, so the two are practically identical. Nonetheless, the component circled below indicates that the first aircraft is the G4M1.
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That loop is featured on drawings of the G4M1:
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But not on the G6M1-L2 series.
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Click to enlarge the above thumbnails.