Il mio Terten cal. EB 8420 funzionante non l' ho mai polsato

Globus Chrono

Spostato in sezione corretta.

tre crono anni 70, a sinistra calibro baumgarten , al centro e a destra calibri E.B,

E.B. stà per ebauches Bettlach S.A. specializzata dal 1932 nella produzione di orologi economici con ancora a caviglie

Remarks
pin-lever escapement
indirect minute, hand friction clutch on barrel (Roskopf type, space for big balance)
There are several variants in this family. But they are poorly recorded, and therefore only known variants are listed here.
The movements are often or always signed with the designation of the mostly made variant. Therefore here codes for features are attached to this signature, if the official designation is not known.

family/generations:
layout for sub second:
8400: 10.5''', no second
8401: 10.5''', sub second
8404-8406: 10.5''', *
8410: 11.5''', no second
8411: 11.5''', sub second
8414-8416: 11.5''', *
8420: 8420: 12''', chronograph, date
8421-8425, 8428: 12''', *
8429: 8429: 13.5''', chronograph, date
8450: 8.75''', no second
8451: 8.75''', sub second
8454-8456: 8.75''', *
layout for sweep second:
8460: 8.75''', no second
8461: 8.75''', sweep second
8462-8467: 8.75''', *
8480: 10.5''', no second
8481, 8488: 10.5''', sweep second
8482-8487: 10.5''', *
8490: 11.5''', no second
8491: 11.5''', sweep second
8492-8497: 10.5''', *
suffix -73: new balance, since 1973