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Svenska Radioaktiebolaget (SRA) key from OT SM2JKI (SK) dissolving.
TX/RX switch on top and a four prong rubber molded "toothbrush" connector.
A miniature manual key, hand made by OT Jalo Ojanperä OH6FJF in 2016. All brass, weight 350 grams, brass footprint is 28 x 62 mm. It is even rarer because of the almost square base and the inductor, both original to this Naval commercial key. Some similarities to the "Lautkari" K81 key, but simpler.
Thousands of these keys lure in swedish hamshacks around the country. Similar mechanics to the Swedish Pump key by Lennart Pettersson (see K40, K41) and the Military key K71. Here we have an early (look at the knob) very rare Danish Amplidan "single adjuster" key. A key bought from the Navy radio club OH1AJ in Turku. The key is the first edition with screws at the bottom!
Different makers in several Common-wealth countries, distinguished by letters around an arrow: GB =↑(no letters), Australia = D↑D, Canada = C with↑inside, New Zealand=N↑Z. USSR 3TA (TKF) bakelite key, "OTK 123" approval stamp inside. No markings, heavy marble base, manual TX/RX switch at left.
Kenpro KK60 long lever key with ball bearings, adjustable rear silver contact, and a Perspex dust cover. The company is now owned by Vertex Standard (Yaesu). A British bakelite key used with the British Racal set. Made by ZTA Telegraphy Equipment in Cherkassy, Ukraine. Swedish key, made by SRA (Svenska Radioaktiebolaget) for the Swedish military in the 1950's.
Here we have another Bulgarian army key from the 1970's. Poor quality, as with most eastern block stuff - cheaply made and flimsy! British manual key made in the era 1920-1935 for the Amateur community by the department store A. It came mounted on a board together with a mechanical buzzer/battery holder, so it has been used as a training key. It was used onboard m/s Bore Star/Silja Star (OIGM), later Orient Express (9KVJ), still later m/s Wasa Queen (OJDZ).
Metal base, stamped lever and moulded plastic cover. Probably a late model, since it's nickel plated, and the knob mght be exchanged. This is a Norwegian commercial key, produced by NERA A/S.
Finnish Armed Forces key, marked "Puolustuslaitos".
A swedish SSA-key, sold by the Swedish Amateur radio Association (SSA) in the 1970:s. It is originating from a Frenchman, who's father served on that aircraft. More info by Christian F9WO on this key (in French) K95. Stainless steel on bakelite base, originally mounted on a 2 mm thick steel plate. Similar pivot system as in the Swedish key with a flat blade spring.
This key actually served onboard a French bomber during WW2. These keys were standard issue for training purposes by Luftwaffe. Polish straight key "Bocian" (the Stork) from 1960-70 used by Polish national defence organization Liga Obrony Kraju (LOK). The key was bought from UK with some British knob which didn't fit at all well. Telegraph key from SK OH6TS Rolf, given to me by Thomas / OH6LEI. I don't know the origin of this key, but it is much heavier and has thicker materials than the typical J-37:s.
This one is made under licence by Sedgewall Communications Group in the 1960's. It is from a Finnish artillery radio, type VRGK, used during WW2.
I got it in my collection by a kind swap operation with Mr. Nickel plated brass with 6-ball bearings, very precise and easy to use.
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The key itself was originally a part of a British field phone set used to mark end of call or a free line. Identical to their model K 64, without cable and plug. These were first called REX keys due to the maker, a mechanical shop "Radio REX" in Östersund/Sweden. This is a Finnish KBX-102B key made by OH1KB Tapio Hirvikoski's moulding company "TH-yhtymä Oy" in Pori, which closed down 2012. TH-company also made manipulators and electronic bugs (KBX-101). Made by G3SRK, Jack Sykes' company Lingard Electronics around 1960-1970's. It is probably a testing key, there are different special keys for telegraph cable capacitance tests.