Debaser... welcome to the elite BSS club.
Your BG looks in better shape than mine; which has the blues starting to flake off (especially in the planes).

The targets are at impossible angles... I think I've only successfully spelled SQUADRON once since owning it. LOL

It's an interesting combination of Bally/Chicago Coin/Stern design-pieces it seems.
Let me know if you need the apron cards... I carefully scanned and reproduced mine.
I started to redo the diagnostic sheets too, but haven't completed them.

Vid... no idea how many were made.
My serial number is BSS1263... (front lower-right corner below coindoor)