"An improvement of the 20.3cm twin gun, it is the No. 3 twin gun.
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"The no.3 twin gun is an upgraded version of the 20.3cm twin gun.<br>
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It is a further improved model of the excellent heavy cruiser main gun.<br>
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This model further enhances the originally high-performance heavy cruiser main gun.
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An extremely excellent heavy cruiser main gun with a length of 55 <ref>The original 20.3s had a length of 50. This means the barrel length was 10.15m (20.3x50). The no.3 had a longer barrel of 11.165m (20.3x55).</ref>was made.<br>
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Although this gun is excellent, it wasn't able to be mass produced due to economic trouble. So only a few prototypes were made.
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This weapon is an excellent 55 caliber main gun for heavy cruisers.
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It is an excellent gun, but there is a flame in economic efficiency, it can not be mass-produced as there is a limited supply of prototypes."