German spy recorder - working 1951 PROTONA MINIFON - Mint Condition, first model

Description

German spy recorder - working 1951 PROTONA MINIFON - Mint Condition, first model - in original cardboard box!
36 detailled images
and
link to a Youtube video
I made of the restoring results and the working machine see below text ! !
The almost unbelievably beautiful and original condition and possibly existing traces of the years can be found in the pictures and I ask you to form your own opinion. With the needed currents attached in my workshop I was able to get it working. It was recording with the microphone and playing the recorded voice with the headphone - please see video. The movement is cleaned and fully serviced.
A wonderful rarity in a
bsolute original condition
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Mint Condition
!
"This Minifon was the first of a successful series of portable minature wire recorders built by Monske & Co GmbH (later: Protona) in Germany. It was introduced in 1951 at a time when transistors were not available yet, and all consumer electronics were valve-based (tubes).
Using the first generation of minature valves, this marvel of technology measures only 17 x 11 x 3.5 cm, small enough to fit in a pocket or a handbag. It didn't come cheap however: in 1951 one would pay no less than DM 680 for it.
The Mi-51 is battery powered, making it a truely portable device. Bringing the device back to life today is rather difficult however, as it requires three different voltages: 9V (for the motor), 30V (anode voltage for the valves) and 1.5V (for the filaments). It has a recording capacity of approx. 2.5 hours without replacing the batteries
The Mi-51 was invented by Willi Draheim, who started the development in 1948, just a few years after the end of WWII. The Mi-51 was in production from 1951 to 1955, when it was replaced by the P-55. Draheim left the company in 1952, just before the Minifon was taken over by Protona."
Otherwise I ask you to form your own opinion through the hopefully meaningful pictures. Questions will be answered gladly. The beautiful piece is of course
packed in the best possible way
(box in box, strong "big bubble" foil) and all papers for a smooth customs process are added !
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PROTONA Minifon Mi 51
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May I introduce myself: Professional restorer for 35 years:
Keine digitalen Geräte: Die analoge Welt des Peter Kahlich | Schwaben & Altbayern | BR - YouTube
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Foreign bidders welcome! Please ask for shipping costs!
- Feel free to ask further questions!
We have experience in shipping and customs procedure with nearly every country. - Best possible packing guaranteed!
Bienvenue aux soumissionnaires étrangers ! Veuillez demander les frais d'expédition ! - N'hésitez pas à poser d'autres questions ! - Emballage optimal garanti !
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Zapraszamy zagranicznych oferentów! Prosimy o podanie kosztów wysy?ki! - Zapraszamy do zadawania dalszych pyta?! - Najlepsze opakowanie gwarantowane!
欢迎外国投标者！
请询问运输费用！
-随时提出其他问题！
我们在几乎每个国家都有运输和海关程序方面的经验。
-保证最佳包装！
외국 입찰자 환영합니다!
배송비를 요청하십시오!
-추가 질문이 있으시면 언제든지 문의하십시오!
우리는 거의 모든 국가와 운송 및 통관 절차에 경험이 있습니다.
-최고의 포장 보장!
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Please feel free to ask further questions!
Je parle francais couramment! - Ne hesitez pas de poser des questions!
And now the necessary usual and fine print:
The specified properties of the objects can best be verified by personal collection.
Unfortunately, I can't guarantee this anymore when shipping.
The object is really very beautiful, but if you want to find something... I have described it to the best of my knowledge and not exaggerated or lying. If you buy it at an auction, then as described and visible on the pictures. No renegotiations! By submitting a bid you accept these conditions. If not agree please do not bid.
VAT cannot be shown on the invoices due to a disposition for differential taxation.
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