OK1RW 
(now  as well as OK6R, ex OK1ZAD, previous member of OK2KKW)

Name:         Jiří Dušek Address:      check: here, here... Country of License: CZECH REPUBLIC Email Address:   ok1rw(at)centrum.cz License Class: A Grid Square:  JO70FE

Note: the call OK1RW has been used till 1952 by Rudolf "Ralf" Major, well-known ham radio popularizer - active already before WW.II. More: 1, 2, 3, 4, 5.