I may be the last person in the world to have figured this out - and I am not even sure if it is a good idea - but on old shutters which have a dial, like my Universal #5, it is possible to select between the printed speeds. For example, the 1/2 second stop on my Universal is off quite a bit. However, if I dial in slightly less than "2," I get 1/2 second, dead on.
Who knew? Ok, probably everyone, but it was a big deal for me to discover it.
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