A 9x15-in. gunned Salmon & Gluckstein? Nice! Can't wait to see Bismarck and Tirpitz and their successors!
I can't draw new designs from scratch, as said above. But what I can is upload already made designs stored in my files. Taking into account the AU scenario described in the beginning, in 1939 Germany had a very advancded hull construction for what would become the BB Bismarck battleship. Given all the previous considerationjs, would Germany need to spend that amount of money to finish the ship? Germany had in those times (end of the thirties) regained the confidence of the UK as well as of sevceral other European states with which it had signed mostly free trade agreements. Bur it had also secretly signed some separate agreemkents of mutual defence cooperation. The UK was in those times very concerned with its vast empire, and with the upheavals occuring more and more, starting with India and with Egypt, mainly. The Netherlands had also incresing problems in its East India's colonies and the Japanese threat became increasingly bigger. Indochina produced two main products Japan needed in an increasing level, oil and rubber. But the Netherlandws had no means at all to stand up against an eventual Japaneese incursion. And here was the opportunity the German government saw, back in 1938/39, to act as an "anchor" to help some countries to face their respective threats, mainly Finland against the soviets and the Netherlands in East India. This is why in late 1938 Berlin gave the final "go ahead" to finish its first real battleship, maintaining its main armament, four double Drh.L. C/34e type turrets with two 38cm radar guided cannons each, firing normally 38cm "Sprenggranaten" (armour piercing granades) at a maximal range of about 35km.
One big change to the original plans was that four steam turbines with four shafts in total were installed instead of the three units originally planned. These Brown, Bovery geared turbines were located amidships in separate and watertight compartments, each turbine fed by four Wagner high pressure boilers, allowing each to deliver a maximum output of 50.000 shp. The engines were installed in such a way that the big three bladed screws on each side were counter-rotating.
Regarding the dimensions, these had been previously altered in 1936, when the keel was to be laid down: The overall length passed from 241,6 m to hefty 268,8 m, the maximum width (beam) from 36m to 39,75m and the overall displacement from 50.300 tons at full combat readiness to 53.760 tons. The basic hull design of the front part was slightly altered to allow a higher bow. A big change in electronic layout was that the DKM entered an agreement with the main electronic equipment manufacturers in such a way as to "Bismarck" serve as testbed for the different types of radar developed in those times. The DKM beared the cost of the optical rangefinders and the radar equipment providers offered the antennae and colateral equipment at a 50% discount. This way both sides intended to use several types of radar in the harsh deep water conditions, summer and winter, and give each provider the respective findings.
This way, on the top foremast a FuMO 26 was installed on a 8m rangefinder, with a FuMB-"Bali" IFF on top. This radar antenna had a range of 25km and an astonishing accuracy of 0.25º both in height as in lateral deviation (source: "Radar Equipment of Germany"). On top of the front shielded and reinforced command compartment a FuMO-213 "Würzburg D" was mounted on top of a 5m rangefinder with a new 4m wide mesh made dish for significantly better signal receiver. This unit served as direct fire control for both the forward towers. At the rear fire control station, a newly developed FuMO 63 "Hohentwiel-K" was mounted on a 8m rangefinder together with the usual FuMB-3 "Bali" IFF unit. This unit was Telefunken's answer to Lorenz units developed at least six months earlier. It served as fire director of the the two rear artillery towers and had roughly the same precision of the FuMO 26 but at a greater range of 35km. On both sides of the superstructure two FuMO 213 "Würzburg-D" were mounted on 3 meter 3D stabilized mountings serving as fire directors for the 15cm artillery on the respective side.
DKM "Bismarck" battleship was finally ready to be delivered on August 1940. It served during one year as admiral ship of the fleet the "Baltic Alliance" sent to the Black Sea, to fight the soviets on the southern flank and in October 1941 she was the admiral ship of a fleet Germany sent to the USA to show the gratitude of the "Baltic Alliance" towards the Americans by supporting it in its fight against the Soviet Union. The fleet visited Baltimore, San Diego, San Francisco and in the first days of December, 1941 headed west to Hawaii.