Is there any way to find out what was the first unusual hat/cosmetic unboxed from an unusual effect series? (such as series #2)

[eeeeeeeeeeeeeeeeeee]

i'm asking this out of curiosity,since the first unusual unboxed is somewhat-known however the first unboxed series #3 hat for example is not known.I'm pretty sure that the backpack history deletion made this harder to find but perhaps someone can shed light to this?

[Big Ol Bessie]

Circling peace sign stout shako was the first unusual unboxed 

[eeeeeeeeeeeeeeeeeee]

3 hours ago, Big Ol Bessie said:

Circling peace sign stout shako was the first unusual unboxed 

i knew that,i asked about the first robo unusual,first series #3 etc