German keyer T-1 was part of war prize. It was made from Bakelite black colored (there is and variant of dark brawn color). It was caret eristic for very soft, gentle, contact (construction of keyer lower contact plate is hangingin air, and then curving by pressure, which gives specific feeling while typing). Keyers had had string of markings on Bakelite and metal plate, which identifies factory, product model and year of construction. Except that, from the left side with white color is a mark in shape ofeagle. Operators (especially immediately after war) were unconformable with nazy markings, so they were removed, or at least swastika. Keyer is known in Serbia with name TAP, by contraction on cover. Thanks to quality, keyer has been used for many years.
For difference from T-1, German mini keyer was known as The German Mouse, rarer in Balkan territories.
Keyer Junker was one of the most high-end and most appreciated hand keyers. It was made in Germany before, for, and after World War 2, with small modifications.
Keyer VR-150 was Yugoslavian product. Basically that was copy of German T-1. Quality of manufacturing, basically from red and black Bakelite. Because of two models: brown, which had all Bakelite parts in brown color, and black which key bar have an Bakelite cover from black color. On cover there was an red star with JA marking which stand for Yugoslavian army. In between operators this keyer is very popular.
Homemade keyer TS-1 has became part of stationary, mobile and portable radio stations sets. Because of that it is manufactures with two stands: one is common, for work from stable surface, another is for fixing to the leg of solder. Stand and cover are made from metal, green color. Base of keyer and button is made from black Bakelite, and its half chromed or nickel plated.
This keyer is used for base of building many modificated versions, used specially in cabinets for Morse code learning (TS-1 student, RTG01 and others).
Keyer TS-3 is a keyer designed for training and conditioning of radio telegraphs, so it have installed tone oscillator. It was predicted and possibility for use of Morse telegraphy in direction network or circular, plugging in connection over inductor central MP-10, or directly to HF units (non modulated CW) and VHF units ( work with modulated CW). The way how keyer worked is selected by combination of two switches. There were manufactured a modificated versions for completing various classrooms for educating radio telegraphs (an example TS-3 Vihor). Power supply: two R-6 (AA) batteries.
Keyer TS-4 is also manned for training and conditioning, but it has been used and for operational work. It replaced the TS-3. Small dimensions, it has installed tone oscillator. It was used automatically or in stationed classrooms for learning Morse code. Better quality than TS-3, tuning was better, tone oscillator was working better, so it was accepted from radio telegraphs pretty fast. Power source: two batteries R-6 (AA).
In various completes of spy radio stations and radio stations packed in suitcases, there were miniature keyers. For example, with Britain radio unit designated Type 3 Mk II it was delivered and mini keyer B-2, with unit BP-5 miniature keyer, which was installed on top plate of spy radio station AP-5.
With units gathered from Soviet Union, there were various keyers, of which most often was military ones, scholastic and KM (known and as TK), KM-F (TK-F). Letter F means that all keyers in the stand had a installed HF filters.
American units are delivered with all sorts of keyers, most often J-37 (on standard stand, or as KY116/U on metal holder for leg) different variants of keyer Electronic Series and others.
Imported radio stations Collins PRC-515 and Yugoslavian RU-20, in complete had keyers KY-5033. They were different by that imported KY-5033 (PRC-515) had markings in relief, while Yugoslavian KY-5033 (RU-20) has markings printed with white color. Because of poor tuning keyer had not been respected between radio telegraphs, so usually it was replaced with TS-1.
With radio stations manufactured by Racal, there were bigger keyers, manufactured by MORSE EQUIPMENT LTD, with stationary units and Racal mini with portable units (TRA-931). Number on the upper plate is NATO nomenclature number of keyer, and number 99 stands for Great Britain.