Panzer III K

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Pz.Kpfw. III Ausf. K
This tank was developed on the basis of the later Pz.Kpfw.III Ausf. J chassis, combining it with the Pz.Kpfw.IV Ausf. F2 turret and a 75-mm gun. The first design plans were completed by the end of December 1941. Manufacturing began, but the vehicle proved overly complex and production was soon canceled. A total of 50 vehicles were completed and used as command vehicles. They featured 50-mm guns; the 75-mm guns were never mounted.
The Panzer III, while effective when first introduced, struggled later in World War 2 due to being hopelessly outgunned by T-34 and KV tanks, while being in trouble returning fire as both 5cm and 7.5cm L/24 cannons were effective only when firing special ammunition such as APCR or HEAT. APCR was a short term patch, although an expensive one, while operationally the Panzer III ended up being replaced by the rearmed Panzer IV with the 75mm L/43 and L/48, while the chassis itself found its second life as STUG III.
In an attempt to lengthen the usefulness of the Panzer III chassis, in December 1941 Krupp was requested to mount the Panzer IV turret in a Panzer III chassis, and by the end of the year a preliminary design was ready:
However, this design was never carried out due to several factors, including a large increase in weight that would require new suspension and tracks. Mounting a bigger turret without serious modifications to the hydraulics means that rotation would have become a lot more sluggish, prone to failure or would plainly require manual cranking. Moreover, the tank would have been severely unbalanced.

It should be noted that this proposal should not be confused with the Panzerbefehlswagen III Ausf.K, a radio command variant of the Panzer III that carried a 50 mm cannon unlike other radio command variants.

Давайте мы не будем спорить с Хиллари Дойлом, я боюсь, нам обоим до него далеко, в познаниях троечных модификаций.
Но, в любом случае, то что вы имеете в виду, это Panzerbefehlswagen Ausf.K, командный танк:
https://www.scalemates.com/ru/kits/gunze-sangyo-m-12-panzerbefehlswagen-ausf-k--133870
http://www.historyofwar.org/articles/weapons_panzerbefehlswagen_III_ausf_K.html