Submarine cruiser SM U-139, 3,000 tons, German Imperial Navy 1918, French Navy as Halbronn 1922-1935.
Scale 1:72, 240 parts, 130 cm long. 3D printed: PLA and Resin, upper deck beech.
This submarine class of 3 units was commissioned in 1918. SM U-140 made a 3-month cruise off the North American Atlantic coast in the summer of 1918, SM U-139 advanced as far as the Bay of Biscay when the war ended.
They were the largest submarines of WWI with two 15cm guns, 6 torpedo tubes and about 80 crew.
More info at http://ub1418.info , where the kit is also available.
Brilliant!