This vibrator sounds a lot like the one used in the Canadian High Power Amp for the WS 19 which is called out as follows: Vibrators, Dual 6 pin, type MTS1277 ZA/CAN 7660 It is 5" x 4" x 2 5/8" with a perfed metal case. If anyone has any stashed away, I'd sure like a spare or two. Take care, -John