BiasMaster Tube Bias Tester by TAD (w/ 4 x Octal & 4 x Noval Adapter Probes)
Unit itself has not been opened, and none of the other boxed components have been used. I bought the original unit w/ four noval (9 pin) probes for £154 on Hot Rox UK, and added four octal (8 pin) probes to the order for £40, totalling £194.