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12.5''', Dm= 28.15mm, Do= 28.5mm
f = 19800 A/h
power reserve 54h
Balance staff U3085
Mainspring / battery
1.0 x 9.5 x 0.10mm
1.40 x 0.80mm
Comments about the data
micro rotor, double jewel bearing if 21 or 30 jewels
double excenter regulator for curb pins and stud carrier
selfwinding gear with direction switching by a pinion floating between two huge jewels (Fig.3)
indirectly driven minute allows a low profile
(details cf. Buren 1320)
since 1966/67 minor modifications of base plate (cf. Buren 1322)
1280: only hour, minute
1281: date for flat dial
1282: date for domed dial
1321: second, date for flat dial
1322: second, date for domed dial
The assignment of flat/domed dial is based on few investigated watches. Possibly Buren didn't sign carefully, since the Flume K3 mentions it vice versa.
Example, year: signature; shock device
1) 1965: Buren Watch Co, 1280, Swiss Made, 30 Jewels; Incabloc
2) ca. 1965: Dugena, 1320, Swiss Made, 30 Jewels; Incabloc
(Dugena 1320, Buren 1320)
Not for Sale!
The movements presented in this caliber finder are not for sale. This is only a data sheet for identification and evaluation of the movement calibre, as well as for approximate dating.
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