the difference between 17 jewels and 25 jewels is 8 jewels.

Jeff

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: Thanks for the confirmation Jeff, that's what I
: was looking for. Just one more bit of
: obscure trivia from 20-25 years ago that I
: can put to use someday. Perhaps with that
: knowledge and a $1.50, I can get a Bold
: Venti Coffee of the Day with extra whole
: milk at Starbucks????

: As for the Cobra, Mr. Shelby actually only sold
: a handfull with the short stroke wide bore
: cross bolted 427, and all the rest had the
: longer stroke smaller bore two-bolt (and
: much less expensive) 428. Mr. Shelby knew
: few would be able to tell the difference in
: a car weighing just over a ton, and he also
: knew he better have a refund program set up
: in the event they did discover it (which he
: did).

: As for the 8 additional jewels in the later
: model ETA, I guess in their search for
: excellence they found a way to build a
: movement with less friction and better
: reliability (for extra cost?). In any case,
: I now know there are two versions of the
: Spiro out there, and I appreciate you
: sharing the info with a curious rookie.

: Sincerely,

: P

: Nashville, TN