I think until last few years prob like arcade machines as well stuff just wasn’t deemed valuable and if a pinball didn’t work it was just a big heavy wooden box of lights, so very conceivable it was trashed
Thats why production numbers aren’t very vindictive of real numbers still around
I own some pinballs with very very low production numbers (e.g only 99 made., but in reality there’s now prob 5 left making it crazy rare)
And some production numbers were purposely inflated. Gameplan claimed to produce approx 500 units of andromeda and Cyclopes but in truth they only made approx 250. Today there’s prob not even 60/70 of them left. I suspect much less but who knows.