Hinderer Fatty Spanto history query

[mtngunr]

Not covered much of anywhere, aside from sales of same, and from which I cannot draw any conclusions.

So, would anyone happen to have some ideas as to what years runs of fatty spanto XM-18s have happened?

And since often runs only picked up or requested by certain dealers, any ideas of who carried them and when?

I own a couple, but always obtained either second-hand or unrecalled by original buyer ("oh, maybe 4yrs ago? cannot remember from whom.").

Thanks for the time.