and the single black line on the turret, should most likely be dark grey, indicating a break that are not 90 degree. But.... the turret doesn't match the turret from the book
and if you study the drawing from the book, you can clearly see the tower structure is smaller then the bridge structure
So seeing the drawing from the book, year the ship was ordered, what design it have and turret design. Turret manufacture is Ansaldo-/Oto. turret type and caliber.
With this information, I conclude that "Taksin-class" is a smaller version of "Duca d'aosta class" light cruiser, as I stated earlier. by the following fact:
- Ordered 4 years after Duca d'aosta class was build
- same basic design layout, just smaller/shorter
- main gun type is exactly the same Duca d'aosta class was equipped with 8 × 152 mm (6 in)/53 Ansaldo/OTO Model 1929 in 4 twins turret, Taksin class have the sane guns but in 3 twin turret
- overall hull shape is the same
- Hatch in the hull side under the turret on the book drawing of "Taksin class" match location of hatch on "Duca d'aosta class"
For me it looks like the Italian Naval-designer took the Duca d'aosta class drawing, and removed a section of it.
Just look at this drawing bellow, and compare it to the book drawing:
And by just using the drawing from the book + Duca d'aosta class drawing and some parts from that ship and other Italian ship. In addition shorten and redraw Duca d'aosta class drawing, you get a ship designed by Italian naval architect:
(Note! this is a very simplified drawing, with simplified shading. it need's a lot of parts and other things, to make it look busy)
I would say you are getting close, I just followed the drawing from that book. one tip: "DETAILS"
For sea-plane, I would be surprised, if the ship come with an Italian made sea-plane, like the one Duca d'aosta have.