Technical Stewart Warner sheets per hour gauge

Thought this was a tachometer at first. But happened to notice it actually said sheets per hour. What exactly is it? As you can see in pic it's a good size gauge. Didn't find much on Google. And can it be used as a tach? If not no biggie as I collect anything Stewart Warner anyway. Just curious

 

@e1956v may be able to shed some light on it

 

Just realized the date code isn't visible in pics. K6. Which I'm guessing would be 1942

 

Just a guess, but maybe was installed on a printing press so the printers knew how long it was going to take to print out a job. Could be driven by a speedo cable geared to the machine. Back in the day, newspapers were where the news came from, and competitors raced to get stories out first. Fast presses were a big advantage in the days of "EXTRA, EXTRA, read all about it." Maybe there's an old printer out there who can tell us.

 

Could it be from a printing press?
Edit : I wasn't fast enough.

 

I would be good to spin it up on a power drill to see what it reads at a known rpm

 

That’s the first one of those that I’ve seen. I’ll check the books and see if I can find calibration information on it. If not I’d have to get it on the test bench. It should be possible to calibrate it to run off the distributor and use it for a 8000 rpm tachometer.

 

It has a calibration tag on it if that would help

 

Printing press for sure.

 

What does it say, or can you post a pic

 

I will when I get home in a few minutes

 

Looks like 5000-1000

 

I’ll try to check the books later today

 

Ok here is what I found as a reference.
The meter was made for the company
Har-Sey’d.
The calibration tag reads 6000 to 1000.
That means when the test bench reads 1000 RPM the gauge should read 6000 +or- 100.
Which is shown on calibration chart 22.
I ‘m pretty sure I could calibrate it to read off the distributor, sometimes it takes a lot of time switching hairsprings and trying different levels of magnetism by charging and discharging the magnet. It’s difficult sometimes to get a correct RPM reading all the way through the scale.

 

Engines I run max id actually need it correct to is 6-6500. And they tend to live below 4k in my normal driving

 

That info that you have is very useful for your business. You are fortunate to have it.