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I think the manufacturer was Bessler and they were called optical configulators which also used Silver when it was $2 an ounce. You might be able to find one in Kodaks museum.
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Kevin
Kevingoto.smugmug.com
2000 740i-Annalisa and 2008 335i-Weebl. Weebl may wobble but has DTC 
mods HPFP,4 new injectors,1 transfer pump assembly,front wheel bearings A few E9X Nerd points  |