What am I hiding ?

A “certain” item came into my possession yesterday. The above photo was taken this morning (at home) and at this stage I am unwilling to reveal what lies under the cover. (That’s my tea towel by the way).

A few hints to get you guessing:

- It certainly is eerie.
– My source must remain a secret.
– Most people would be unwilling to look at it – let alone touch it.
– It is legal.
– I know it’s history (makes it even more bizarre).
– It might appeal to those with a (very) black sense of humour.
– As long as it remains in my possession I will treat it with respect.
– It must remain in PNG and never to be taken out.
– Museum material.
– It is in good condition but needs a good “clean”.