Who makes these gauges

These old school gauges were in the car when I bought it.. Boost gauge says IMP but I cant find any info on the company anywhere..

Also a knock gauge.. Anyone know the maker? Are these knock gauges any good? I assume red means let off the skinny pedal...

How old are these gauges? Coil pack even says ESP

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Hmm couldn't find anything on the IMP gauge either. Must be older than the internet...
 
That is an old Eastern Performance coil pack. Used to buy stuff from them a long time ago--do not know what happened to them...
 
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