That CRT looks like it might not be usable. Those old HP CRTs often developed mold(?) between the front of the CRT and the bonded on safety shield. I had a bunch of HP 64000 development systems that did that and think the CRT was made by the same people, "Clinton Electronics", IIRC.
That band around the CRT in your's should not be rusted like that. Somebody has stored that unit in a damp location.
Looks exactly like the 1610
B that was on ePay in the UK, the stickers & mold are identical.
https://www.ebay.co.uk/itm/185283976884 The mold and lack of pods with it, put me off buying it, however the rest of it doesn't look bad from the outside.
A lot of vintage electronics in the UK is rusty, corroded, etc, houses are small over here and stuff got abandoned for decades in crappy leaky/damp sheds/garages/attics, sadly not much we can do about it.
Never heard of Clinton CRTs, wonder if they actually made it, or if it's a rebrand. Is it glued together like some old TV CRT safety lens were in the US? The method of removal varies depending on the glue used by different brands, would be a summer job over here to avoid getting moisture trapped when reattaching it.
David