Vacuum tube tester Tesla BM215 is well know testing device used in supply shops in socialistic Czechoslovakia. For further reading you can visit pages http://www.oldradio.cz/meraky/bm215.htm .
Photogallery of my device during cleaning process and first mesaurment:
List of mesaurment cards is available from link http://www.oldradio.cz/meraky/bm215/karty001.htm . For new or some exotic types of vacuum tubes can be used online generator of mesaurment cards http://sroll.net/ok1srd/technika/bm215/.
Next video show mesaurment device in partialy disasembled state.