Horizontal Cassette Deck from the ’70s.

The Graetz Profi Corder 306, manufactured in 1975 in Germany by Graetz, Altena (Westphalia), stands as a testament to the high-quality audio equipment produced during the 1970s. This Stereo Horizontal Cassette Deck was designed to complement the professional-class receivers of its time, boasting an array of features. The separate slide controls for the right and left stereo channels allowed users to fine-tune their recordings, ensuring optimal sound balance. The device incorporated illuminated VU meters, enabling users to monitor the audio levels accurately. These meters provided visual feedback, allowing precise adjustments to achieve the desired recording or playback volume.
The Profi Corder 306 embodies the aesthetics of its era, showcasing a design that seamlessly matches professional-class receivers from the 1970s. Its sleek horizontal layout and clean lines exude elegance, making it a visually appealing addition to any audio setup. The build quality of the device is noteworthy, as Graetz paid meticulous attention to detail, ensuring a robust and durable construction that would stand the test of time.
One notable aspect of the Profi Corder 306 was its practical storage compartment for eight compact cassettes, seamlessly integrated into the housing. This friendly design showcased Graetz's attention to practicality and convenience, ensuring that users could conveniently store their cassette collection within the device itself. This feature was not only aesthetically pleasing but also facilitated easy access to tapes during recording or playback sessions.
Part of the collection of the Retro Audio Museum (Lelystad, the Netherlands), and is not for sale.

 

This deck looks surprisingly similar to one I have (it's the only one of this type in my collection): the BASF 8200 HiFi.
Some info about it here:
https://www.hifiengine.com/manual_library/basf/8200.shtml
https://www.radiomuseum.org/r/basf_cc_hifi_stereo_deck_8200.html

Some particularities I noticed on my unit are the following:
- it uses an AC motor powered directly from the mains transformer. Speed regulation is done solely by a big heavy flywheel and and somehow loose belt.
Not great compared to closed loop systems, but it does the job done. Only issue is speed will vary with mains frequency.
- it uses a ferrite&ferrite head, something you don't really see that often.
- it uses discrete Dolby NR circuits

Tha latter 2 aspects are also present on the newer SONY TC-153SD: https://www.petervis.com/Cassette_Tape_Recorders/Sony_TC-153SD/Sony_TC-153SD.html
However this one has a different case design compared to the type presented in the original post.

 

Thank you for your comment! I have BASF Diamant 3000 in the museum collection, and I was sure that BASF have ordered the production for this cassette deck to ITT. However, now I think that possible Graetz could be involved as well.