Hi Jeff,

as an expert in autavia (not only siffert) here my comment:

If you guys start segementation into mark 1-6 categories, I would do 7 rather than 6: here would be mine: the one with silver hands and thin dark blue inlay is the rarest of all sifferts..after seppi one. the question is, was this now produced with both V's? I have only seen with narrow V. I have seen 3 pieces (out of 50 in toal :-) of this version: ALL big block dial.....
so its

mark 1: Seppi
mark 2: big block, steel hands narrow V
mark 3: big block, steel hands narrow V with blue inlays: for me similar scarce than the Seppi one.
mark 4: big block, steel hands white V
mark 5: steel hands with black makers, 36912 with blue inlays: I doubt this exists: if you see when the steel hands with blue inlays popped up: no way for me...its a hand set often seen with Valjoux 72 movements: so at this time OK...but at the time of the black makers not in my eyes....
mark 6: vic hands, black makers and 36912 dial: I personally doubt this is existing (see endless discussions)
mark 7: vic hands black makers with 123456789101112 dial: yes this is most common siffert

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so mark 5 & 6 are "put-togethers" or serviced watches: whoch makes especially for the mark 5 very much sence as at this time no steeel hands but 35912 dial and later hands.
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so may be more 5 instead of 7? sure not 6 as if you would expand by broad V theme you even get more combinations :-)

Alex

: Thanks, Alex . . . I will add this serial number to the ranges
: shown in the Table.

: As one of our top experts in the Sifferts, I would like to know
: whether you agree with the Mark 1 through Mark 6 designations?
: In particular, do you agree that the Mark 2 (pointed V) is
: earlier than the Mark 3 (flat V)? Also, in your experience as a
: collector, is the Mark 2 a rarer execution than the Mark 3?

: Thanks for the new serial number that you have provided.

: Jeff