180 YEARS OF

The new Longines
Avigation Type A-7
with Cal. L788.2
Elapsed Time | CHRONOGRAPHS
The NEWEST
VARIATION of
Cal. L688.2 is
called L788.2.
tened the 13¼-lignes movement with automatic winding,
a power reserve of 54 hours, and 27 functional jewels, the
Cal. A08.231. Old standbys include a unidirectional ballbearing
rotor, a rocking pinion clutch and the oscillating
and escapement system. Its Glucydur balance and at Nivarox
hairspring vibrate at a frequency of four hertz,
which permits a timing accuracy to 1/8 of a second. e
totalizers make it possible to record time intervals of up to
12 hours. is newcomer is not viewed as a derivative of
the Cal. 7750 but as a fundamentally new design. Since the
load on the column wheel is distributed over six columns
during on/o cycles, wear is less of a factor than with the
shuttle or cam that, due to its back-and-forth action, concentrates
friction and pressure solely on two points. e
advantages include smoother cycles, crisp shiing action
and fewer components. A high degree of serviceability is
ensured with a self-regulating reset hammer for the
chronograph hand and minutes totalizer. Two pushers are
provided for start, stop and reset functions.
e newest variation, the L788, has only one crown
pusher and recalls the earliest years in chronograph
history. Only 180 numbered anniversary pieces of the
Longines Column-Wheel Single Push-Piece Chronograph
180 th Anniversary Limited Edition were created
for the occasion. e model used for this retro chronograph
hearkens back to 1913. Features indicative of the
time include a white dial with a red 12 and a round case
with pivoting wire-type lugs. Clearly all good and beautiful
things will continue to have great appeal throughout
the 21 st century.
LONGINES SPECIAL WatchTime | 49