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1:47 AM
that might be a good meta question :D
 
well we have arts and crafts.SE so more gooder over there.
In Bicycles we know the absurdity of tyre-naming systems and how 29" is smaller than 27" and that 2.5" is not the same as 2 1/2"
In sewing machines, the same horrid mess exists around needle naming.
there's a dozen different schemes and its truely awful.
I discovered that the ones I need are "rare and valuable" but there's only fractions of a millimetre different to a boring common size. That difference is enough to wreck the bobbin case though.
Vintage stuff is hard work :-\
 

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