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Fig. 1

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Fig. 2

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Fig. 3

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Fig. 4

Eterna 1416U

sweep second

13.5''', Dm= 30.6mm, Do= 31.0mm
H= 5.55mm
(ball bearing +0.05mm)
F= 1.5mm
T= 2.1mm
17 jewels
f = 18000 A/h
power reserve 48h

Balance staff U2266

Stem W2411

Mainspring / battery
1.55 x 11.0 x 0.11mm

1.50 x 0.90 x 0.21mm

Comments about the data

option: micrometer regulator

without/with date respectively:
1411/1421: 11.5''', domed dial
1412/1422: 12.5''', domed dial
1413/1423: 12.5''', flat dial
1414/1424: 13''', domed dial
1415/1425: 13''', flat dial
1416/1426: 13.5''', domed dial

old: identified by pawl wheels, late samples with details of new base plate
new: base plate modified, new pawl wheels, late samples with 2-spoke ring balance
suffix UD: 3-spoke ring balance, new hairspring stud and hour-wheel spring, early samples still with balance, stud and/or spring from predecessor, and partially without number

Example, year: signature; shock device
1-2) 1953: 3842780, Eterna-Matic, Brevete; Eterna-U
3-4) 1953: 3872143, Eterna-Matic, Brevete; Eterna-U

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.

bidfun-db 21.3 © 02-08-15, mtr-Ranfft

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