Now THAT is a fascinating snippet that’s new to me.  Someone made a rule that
bears the sizes of wrench openings needed.

Do we have a date of manufacture by Rabone?  


and - does anyone else appreciate the typestyle used on old steel rules?  Rabone
I find to be particularly elegant in a functional way.  Laid alongside a modern
sans serif laser etched millimetric one the other day I had one of those brief
’the old tools have a fitness for purpose that is evidenced in the design and
the detail that has been lost in our modern age.


Richard Wilson
Near the North Eastern coast where a fret is blowing in to dispel the hot couple
of days.