The neck is 29mm.
I've used my cheepie component IDer, the horiz. coil measured .9 ohm and .13 mH.
The initial problem was the monitor seemed dead. B+ from the switching supply was getting pulled down from 83v to 35v. HOT was getting... hot. Removed the HOT and tested it, seemed fine with a meter transistor check. Unplug the horiz coil and the monitor is much happier. B+ is normal. No HV though.
FWIW, here's a view of the chassis on this beastie:
You can see some of the glue which has turned brown / conductive. I've removed it since taking this photo.
Higher resolution version of that photo, and the back side of the PCB here:
http://compu85.net/stuff/xerox/6085/monitor/
-J