If I remember the details correctly from a book on the 152 I read a few years ago, this particular model was made specifically for the exhibition stand that the manufacturer of the 152 named "VVB Flugzeugbau" had on the 1958 Leipzig Trade Fair, which was back then one of the biggest fairs in Europe.
See minute 3:00 and onwards on this video: https://www.youtube.com/watch?v=6stELlxnNvw
After the decision to close the GDR Airplane Manufacturing industry in 1960, the cutaway model disappeared "off the radar screens" for a long time.
Fast forward to the 1990s, with Germany already re-unified, a person from the former East German TV Studios DEFA called the Dresden Transport Museum telling them they had a three metre long model of the 152 in their archives, and if the Museum may have any use for it. And so it got back to Dresden, was subsequently professionally restored and is now on display at Dresden Airport, alongside the restored fuselage of the 152 number 011, but unfortunately within a building which is only accessible for certain events or as part of a guided tour.
Pictures here http://www.flugzeug-lorenz.de/index.php?id=118
On a personal note: to me, the model represents the "holy grail" in terms of airplane models: a 60 year old one-off cutaway model of a one-off airplane type (152V4) made by a manufacturer that does not exist anymore, and from a country with the same fate. How much rarer can a model get ?