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Movement 798.002


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Anybody in the group know I can download a tech sheet on this movement?  In the process of disassembling this movement.......it runs but it’s losing time.............. l am learning by  taking apart cleaning and oiling and putting back tOgether certain movements.......

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Hi with the takeover of the ebauches , and various other swiss watch companies By the SWATCH group the information on ETA watches is now getting harder to obtain unless you are a purchaser of their products.  The ETA tech data Base is now enclosed within that realm. Trade Only

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The 978.001 is practicaly the same as the 978.002 and is an obselete movement.
I dont have the tech sheet for this but as it came in many shapes one could use a third party manual like this.
http://watchreserve.com/bulova-281010

Certina 133 is the same movement to
IMG_20200406_165435.thumb.jpg.2fe45979a16fa33e9a78fff8c97b2fa2.jpgo.

Or why not just replace it with this one.

https://www.esslinger.com/harley-ronda-2-hand-quartz-watch-movement-hq751e-hq978-o-a-3-7mm-to-replace-eta-978-002-and-eta-578-004/

The only downside is the dial is not always compatible with the Ronda movement.

Edited by HSL
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Took a look at this mystery, it seems no tech sheets are availible for this one so the close match and recommended replacement seemed to be the 976.001, but there are quite obvious differences in these two movements so they are not 100% the same but really close. Found some specimens in the bin to show the differences.

Scrap1.thumb.png.45fbd3f9a977bd8724c6dc5bf71e4707.png
 

Scrap2.thumb.png.066769757cb5a7b07f5fd31dc0ad600e.png

As expected the 978.002 only shovs the mechanical outlines at ETA.
https://shopb2b.eta.ch/978-002.html

But for the 976.001 they have the whole techsheet shaboom.
https://shopb2b.eta.ch/976-001.html#description
https://shopb2b.eta.ch/976-001.html#technical-documents
So you probably have to go with the 976-001 for this one.

 

 

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22 hours ago, HSL said:

Took a look at this mystery, it seems no tech sheets are availible for this one so the close match and recommended replacement seemed to be the 976.001, but there are quite obvious differences in these two movements so they are not 100% the same but really close. Found some specimens in the bin to show the differences.

Scrap1.thumb.png.45fbd3f9a977bd8724c6dc5bf71e4707.png
 

Scrap2.thumb.png.066769757cb5a7b07f5fd31dc0ad600e.png

As expected the 978.002 only shovs the mechanical outlines at ETA.
https://shopb2b.eta.ch/978-002.html

But for the 976.001 they have the whole techsheet shaboom.
https://shopb2b.eta.ch/976-001.html#description
https://shopb2b.eta.ch/976-001.html#technical-documents
So you probably have to go with the 976-001 for this one.

 

 

I found a ETA movement out of  Canada that sells the 978.001 movement for 78$... Thanks for the advice

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