I bought them in Moscow in 2015.01. 2 I am the owner. 
Column in very good condition and the patented original photo, standing at my house in Minsk. 
Photos obtained without preparation. Before sending the sale will clean.
 
Custom ETC spikes
Frequency Response                 56 - 23,000 Hz +/- 3db
Sensitivity                                90dB / 2.83 volts/meter
Impedance                               6 Ohms / 0.7 @ 20kHz
Crossover Frequency                 360Hz
High / Mid Frequency Driver      57" (145cm) CLS Xstat electrostatic
Low Frequency Driver               57" Dualforce electrostatic 
Power Handling                        225 watts per channel
Weight                                    50kg each (110lbs)
Dimensions  (HxWxD)              178.6 cm x 65.4 cm x 37.3cm