[time-nuts] Seriously vintage time nut

[David Forbes]

Here's a fellow using a BIG tuning fork frequency standard in 1929 
for some industrial data acquisition system using 16mm movie film as 
the medium...

http://www.shorpy.com/node/4218?size=_original

Then feel free to look at all the photos on the site - they're fascinating.
-- 

--David Forbes, Tucson, AZ
http://www.cathodecorner.com/