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The Graf Spee by definition was not a CA as CAs could have no more than 8 inch guns. Graf Spee had 11 inch guns.
My vote for best treaty cruiser that actually stayed within limits would go to the French Algerie. 10,000 tons, 8"/50 x 8, 3.9"/45 DP Gun x 12, 21.7" Torp x 6, 3 scouts, 31 knots, 8,700nm@15 knots. Armor was about 20% displacement, when many other nation's treaty CA's were a paltry 8-10%. Japan's Mogami class, after receiving their 8" guns in 1939, may have been the best overall pre-war CA.
German classification of the Deutschlands was "panzerschiff" I believe.
Many of the "treaty cruisers" of the 1930's became top heavy during the war from all the AA and electronics installed.
Many of them became marginally unstable in high sea's (and also if flooded by battle damage).
By definition a heavy cruiser has 8 inch guns a light cruiser has 6 inch guns (during the period before and during WW2) It has nothing to do with how much the ship displaced. All cruisers were not to exceed 10000 tons each according to the several naval treaties agreed on and ignored by the Japanese and the Germans. There were also total tonnage limits on the different navies. There were a number of CLs that were larger than some of the CAs. For instance the Mogami, originally a CL was substantially larger than the Furataka a CA( one of the few classes where the Japanese stayed within the limits.)
The Pocket battleships were termed "Panzerschiff" only because the Versailles text limited large ships ("Panzerschiffe") to be 10000t.
Shortly before outbreak of ww2 all pocket Battleships were officially reclassified as "schwere Kreuzer" (Heavy Cruiser). However, if You follow my battlecruiser classification they indeed are type C battlecruisers.
Just like Couragious and Glorious.
I mentioned them in the as designed and commissioned condition:
Image:HMS Glorious (1917) profile drawing.png - Wikipedia, the free encyclopedia
You will see a lot of parallels between those ww1 RN designs and the late 20´s/early 30´s german pocket battleships.
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Not quite. A destroyer was limited to 1500 tons and 5in guns although 16% could go up to 1870 tons making all USA Destroyers cruisers bar a handfull as well as Japanese, German, Russian and a large proportion of French and British ones as well.
It makes no sense for the Mogami to be armed with 6in guns as built to be a light cruiser and when rearmed with 8in ones it becomes a Heavy Cruiser.
I am not denying your definition as stipulated by the treaty but they don't make sense when we are talking about WW2.
To prove the point, can I ask which is your best destroyer in WW2?