Deep Grove Alternator Pulley

[Ricks72Z28]

Can someone determine if this an original pulley ..... I had this on my 70 Z a few years back and don’t want to mis- lead anyone. Thanks

[Hotrodpaul]

Looks like the one's I have, which are real. Should be 3.2" in diameter.

[Mr70]

How much does it weigh?

[Ricks72Z28]

According to my shipping scale 1 1/4 lbs and micrometer measured 3.20 inches.