This bakelite morse key was used for the first time with the RM31 radio station (also called "Super Táňa" - code name), which was developed in the 50's. But the real "boom" of the usage together with a high number of other radio sets started only in the 60's. It was very well designed and became very popular by many users worldwide. It is quite heavy, but what is more important, very pleasant to use. All of the available keys are new old stock and in perfect condition. Made in the 60's (please look at the gallery).