What year is this ISC from? Pics inside

[Hobbes =^.^=]

I need to replace the ISC from my 1g TB. But I don't know what year this particular ISC is from. It looks different from all the ISCs I see online and the 95' ISC I took from my 2g TB.

 

[Mike1992]

Turn it sideways

 

[Hobbes =^.^=]

sideview

 

[Hobbes =^.^=]

I made a mistake, I took apart the ISC, instead of taking it out from the 2 bolts. I didn't see them with the low light, and I finally saw them since it was sunny outside Unfortunately, I still have an idle problem even though I replaced it with the ISC, from my 2g

 

[Mike1992]

That particular ISC is from a 91-94