Ummhhh...It seems that the FuG III and FuG V were very similar equipments.Angel wrote
The radioset you posted on January 21st is a vehicle-mounted FuG V.
Here is a Kfz.305/18 mounted FuG V
Here a similar radio set identified by Funksammler forum member as a FuG III....
viewtopic.php?f=20&t=152193&start=210 image posted on 20 Sep 2016
Regards
Sturm78