Tieni un po di dati sul calibro dell'orologio del papi:
Longines 989.2
Features
automatic
sweep second
hour angle disc
hack feature
Data
11.5''', Dm= 25.6mm, H=2.95mm
25 jewels
f = 28800 A/h
power reserve 40h
Remarks
1977-
When introducted in 1977, the 990 with all features was the thinnest automatic movement with date and sweep second; even in 2003 it is only underscored by movements without date and/or sweep second.
micrometer regulator
two serially coupled barrels, one with fixed spring, one with slip spring
Instead of the date ring, an hour angle disc is mounted, which is operated in the crown position for quickset date.
differences not known between versions 9XX, 9XX.1, 9XX.2
not all calibres made in all versions
family:
automatic:
989: especially for hour angle
990: date and seconds
991: no date
993: no date, no second
994: no second
manual wind:
995: date and seconds
997: no date
998: no date, no second
999: no second
Example, year: signature; shock device
1977: 53500047, Longines Swiss, 25 Jewels; Kif-Ultraflex
(Longines 993.1, dial view 995.2)
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