Sorry Jeff: it's clear that the smallest (blue silverstone) it's done with pantograph...
IT' seams the same "hand" (font) of another famous autavia silverstone came from Germany signed "1163T".

Mine is printed.

: here is another question, for the team: Why do we see two
: different styles of marking / stamping the reference number on
: the cases, between the lugs?

: -- The top sample is a known fake (dark blue, fishbone pattern, now
: marked Heuer), and we see smaller numbers.

: -- The bottom sample is the subject of our discussion, the
: soon-to-be-famous "Bullitt Silverstone", and we see
: larger numbers.

: Why are these done in such different styles? Impossible for me to
: believe either (a) that Heuer had two different batches of these
: cases made (which would explain the different styles) . . . the
: production would seem to be too low, to have required multiple
: batches of these cases, or (b) that these could have come from
: the same batch, but look so different.

: My conclusion: private stamping, done by different people, or maybe
: the same person, at different times.

: Jeff

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