I don't think that railroad gun is the Dora, tanelorn. It is too small, and the Dora, of which you speak, needed two parallel railroads to move, I only see one... BTW, IIRC, only one Dora was deployed by the 11th Army (Manstein). Also, the second was later deployed by Kesselring in Italy.
This drawing of it gives a rather good impression of its scale:
It used 800 mm shells!
I'd guess the railroad gun above is either one of the WWI French or German ones. (?)
Furthermore, see this drawing for comparison with the unit above:
This drawing of it gives a rather good impression of its scale:
It used 800 mm shells!
I'd guess the railroad gun above is either one of the WWI French or German ones. (?)
Furthermore, see this drawing for comparison with the unit above:
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