Hey excellent job as always, your database is outstanding!
I made some replacement coil wrappers today, and I noticed in your version of williams/bally coil wrappers you used the Futura fonts a lot.
Based on my research some years ago, the original coil wrappers (as well as many other stickers/labels on bally-williams machines) used the "Tremolo Regular" font, or the Tempo® LT from Linotype (their website claims that the "Tempo" font was created by R.H. Middleton in 1931)
Indeed, when I compared the two fonts with original coil wrappers, tremolo regular and Tempo seem to be an exact match, and futura has many letters and numbers different (look at "1" and "2" for example)
Anyway, I just noticed and thought I should post about this...