what is this diff from?

[aany001]

I hope someone can help me with this.....I bought a diff from a guy that says its from a 69 camaro but I am not sure.I got the numbers of it.Axle tube #s 2TB-G81521 on the pumpkin # E118 also on pumpkin 1254383 or 1254333.not sure on the last three digits of this number.I hope someone can help me!
thanks in advance
Steve