Pair of vintage Japanese analogue 'balance' meters. Boxed, unused.

[walpurgis]

Pair of vintage Japanese analogue 'balance' meters (I assume that's what they are). Boxed, new and unused. I haven't a clue what their original purpose was, maybe radio signal or stereo balance, who knows. Offers if anybody is interested, please factor in postage.

http://i58.tinypic.com/2mdpkd1.jpg