Studer telephone balance unit (see others TB's listed)

Ex BBC Studer telephone balance unit.
This is one of around 10 to 15 TBU's that I will be listing over the next few days, most of them Sonifex. See feedback for first one sold.
Supposed to be working but untested by me. If there is a problem, please notify me within 48 hours of receipt and return within 7 days for a full refund.
Also listing lots of Sonifex red boxes including 2 new and boxed items.
Combined shipping rate available.