Hi Greg.
It’s weight is about right but I will weight it for you.
I will add a close up of the base from different angles tomorrow,There is a wear ring to the edge from surface contact but that can be produced on a wheel in a min but it looks right and genuine.
I will add some close ups of other areas too and one with the 42b colour next to it and hopefully we can narrow it down.
I researched it for a week before bidding and found nothing.
FB.