I thought I'll try to advertise here as well as ebay...
Recently repaired (HT Resistor, Capacitor and rectifier alternative)
The frequency appears to be in spec after 50 years.
Max voltage output about 80V rms (~230V p2p)
The earth pin and been removed and subsequently lost.
Optional 3 off 5/8" HT Fuses required, they are currently bypassed.
The rest of the specs are on the second picture.
The output "headphone" jack (on the right) has been modified to output about 10V p2p max. The connection posts have not changed.
£80
Location: South, UK (near Brighton)
More & detailed Pictures:
http://jpegbay.com/gallery/005672266-1.html#1Ebay:
http://www.ebay.co.uk/itm/1964-D-890-A-MuirHead-Wigan-Decade-Oscillator-/232120976906EDIT / PS:
I wish I took a photo of the magic smoke the other week !!!