Eterna caliber?

[ITProDad]

Anyone recognize this Eterna caliber? I have a broken main spring.

 

 

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[Nucejoe]

According to Dr ranfft 

Mainspring     1.10*11.0*0.11 mm .

[ITProDad]

According to Dr ranfft 
Mainspring     1.10*11.0*0.11 mm .

Thank you!! But how did you determine the caliber?


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[anilv]

The movement reference is usually found under the balance (circled in red). The longer numbers (not always present) here circled in yellow is the serial number.

Anilv

Edited January 14, 2020 by anilv

[Nucejoe]

http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Eterna_1429U

Eterna caliber 1429U is engraved right under the wheel ( balance). 

High grade movement patented by Eterna.

[ITProDad]

http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Eterna_1429U
Eterna caliber 1429U is engraved right under the wheel ( balance). 
High grade movement patented by Eterna.

Thank you, Nucejoe. I wasn’t sure that was the caliber or another reference. Just ordered this mainspring from Cousins. Already disassembled and bathed in the ultrasonic. Cleaning the details and capped jewels. It is in surprisingly excellent shape. Case is a bit dirty but nothing appears un-cleanable. Will post finished photos when I have it back together. Than you sincerely for the education!!


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[ITProDad]

The movement reference is usually found under the balance (circled in red). The longer numbers (not always present) here circled in yellow is the serial number.
Anilv

Thank you, Anilv. You and Nucejoe have been a great help. I will post the completed work after I get the new mainspring from Cousins and get it back together. I genuinely appreciate the help and added learning you provided.


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