Morse Keys Info etc.

This key is an interesting German design a double-spring key, first I have seen. Works great, but will mount it on a base and add the two terminals shown with it. Further a photo of the double-spring key after mounting on a piece of oakwood with terminals added. Works very nicely. And another German double-spring key with all brass hardware, a nice key to use. Assume it is from an earlier period but with larger size. Probably wrong knob, searching for another more appropriate. In this photo is shown the British morse key brass hardware on wood with three terminals at the rear. Front and back contacts. A nice key to use, no markings showing the maker, model, date, etc. More info needed.
This is the bottom side of the above key, seems like a Marconi made wireless key with the type of terminals etc and the bottom screws with the two holes in each for a special tool. But no markings on the wood or brass anywhere. Here we have an excellent old British telegraph sounder with the old style terminals that can be used by hand without tools. A great sounder in working condition. This last photo shows the J. T. Mill double current key in nice condition, but not cleaned up properly yet. Again the no tool type terminals like on the sounder above, assume from the same time period from the U.K. This is a real nice German Siemens & Halske Morse key from Berlin. I believe the date is around 1900 (1890 to 1905). It appears in the book "Faszination Morsetasten" by Gregor Ulsamer, DL1BFE on page 28. With a caption under the photo of "Gerduschlose Taste von S&H". So it is some kind of key from Siemens & Halske. Will try and find out the meaning of the first word. More later.....(11/29/2011). (01/27/2013)Received great information from Hans - DJ7RK about the meaning of the first word and the whole phrase. The meaning of the first word is: "without making any noise", so the whole phrase would be: "noiseless key". In fact the key is very quiet, due to the front contact is placed on a springy piece of metal rather than down on the solid brass metal that has the terminal on it. Same as on several other German made Morse keys in the past. All very quiet when used.