Point 1: If I go forward with this, I'll rewrite the first description paragraph to make clear that the objects are SCP-XXXX - it's just that this SCP covers a very large number of objects that require roughly the same containment procedures.
Point 2: -003 was, previous to the SCP-XXXX containment regime, treated as a hot potato - if you had it, you tried to dump it. Both the GOC and the Serpent's Hand tried neutralizing it, but both came back with the result that it was "indestructible" - the Hand was of the opinion that it was actually a projection of the entity forging all the GoI's communications.
Point 3: As my response to point 1 implies, there were a large number of these objects; the history is one of the things I'm working on (it's why I posted it here, rather then in drafts; I'm trying to figure out if describing the history in the description field is a good idea, or posting it as a separate document.)
To be clear: I'm trying to figure out a hook for this (see below for one possibility), which is why I posted this here.