I emailed you already - so just for the rest of the watch world:
Don't believe that Bestfit or Flume are even near to complete. There are
lots of calibres between heaven an earth, not mentioned in either of them.
Although my archive just passed the 6000 mark, it contains many calibres
not illustrated or even not mentioned in Bestfit or Fume. And I have no idea
how many calibres are documented in absolutely no register.
Anyway, the Mido 6.75''' extist. It belongs to the first set of Mido calibres
from 1925, consisting of three round movements, 8.75, 9.75, 10.5''', two
oval 5.25, 6.25''', and last not least this 6.75''' octogonal.
I found this calibre in an article about Mido in Klassik-Uhren 8/1998. Most
early Mido movements are based on Ebauches from Felsa or FHF, but since
there is no similar calibre from these suppliers, I think, it was made
exlusively for Mido, or even by Mido.
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