THIELE M5 or M4 Vintage Microphone

I am selling a very rare Microphone, made by the German Company THIELE

Werner Thiele ran a small microphone company at Bergartenstrasse 12, Leipzig N22,
from after 1945 until around 1960. Initially, he manufactured bottle microphones for the
Schneider company in Merseburg. In 1955, Thiele released his first model under the Thiele name – the M1.
This was a bottle microphone without the attached torpedo-shaped capsule – the capsule was built directly into the microphone! To this day, it remains one of the most beautiful microphones of its type. In 1957, the Thiele M4 was introduced. These were available in various – some quite striking – colors. Simultaneously, he developed the Thiele M5! This one was the first with a separate power supply – the bottle was significantly smaller but visually identical to the M1/4! The THIELE microphones were manufactured under his name and the THIELE label until around 1960. Around 1960, he left East Germany, and his employees continued the business. To prevent nationalization, they founded a cooperative (PGH Elektro-Medizin & Vakuum-Technik) and continued manufacturing and selling the microphones under this label. From 1960 onwards, W. THIELE lived at Lucile-Grahn-Strasse 22 in Munich (80), where he repaired television sets. Unfortunately, he suffered greatly from the loss of his quite successful company until the end of his life!
A typical "post-war story"
of East German emigrants! I cannot test the microphone because I don't have the necessary connectors.