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Seiko [5Y39-7120] Info On Replacment Movment Or Compatible

Mkay

By Mkay
in Watch Repairs Help & Advice

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Mkay Member

Mkay

Posted
Posted

Hello All,

Just a quick question here. Had a older Seiko watch that is totally rusted and the cell look like it leaked also. I've been looking to see if i could get a replacement movement for it. But unable to get a 5Y39-4120 from any of my normal suppliers.

 

caliber: 5Y39A

size: 10.5

stem 351-670

battery: 371

function o. SC-D(3)

hands 0.65x1.10

 

would a VX39 work as a compatible?

 

caliber: VX39

size: 10.5

stem : 354-531

function SC-D(3)

hands: 0.70x1.20x0.20

 

Not sure what the hands size would mean and not sure what 0. sc-d(3) vs sc-d(3) under function means

 

I did call Seiko and they said they to see if i could get a replacement moment from them but they said they don't sell movements but did have it in stock if i wanted to send it to them and then get a quote.

 

Was kinda odd since I've always gotten parts from them before crystals/stems/crowns and so on.

 

Any insight would be great

 

Thank you

 

Mkay

 

  • Like 1
dadistic Distinguished Member

dadistic

Posted
Posted

I noticed you haven't got a reply to your question , and I was wondering if you had tired asking on the Seiko/Citizen watch forum. There are some very knowledgeable people there when it comes to Seiko.

 

http://www.thewatchsite.com/

 

 

David S - who knows nothing about Seiko quartz movements  :(

bobm12 Distinguished Member

bobm12

Posted
Posted

Sorry I didn't see this post before, in any case, this is an equivalence published somewhere on the web I found to be useful. I didn't look for your particular movement but I'm sure it will be there....hopefully.

Hope it all works out all right,

 

Cheers,

 

Bob

 

movementEquivalents.pdf

Mkay Member

Mkay

Posted
  • Author
Posted (edited)

Here the watch i already check ebay for the same moment but haven't found one yet also notice that most movements has the wholes on the opposite sides.

RN2m3Gk.jpg?1

 

Here is the movement after a soaking and cleaning already

 

oWHVEte.jpg

 

couldn't get the all the rust of of the one wheel but got most of it off.

 

UsCZsKr.jpg?1

 

I could clean all the rust off of the plate with some sand paper but didn't really see a point since even after a overhaul the watch wasn't running either way the pulse test seems to be a negative. I assume this means the coil or the quartz circuit needs to be replace.

 

Also i believe a 7N32-6 should be a proper replacement for this watch i will most likely give that a shot. it has nearly the same size, has the hole on the right sides and has a cal at the 6

 

• Has 1 jewel
• Stem: 351892, Tap 11
• Date at 6
• Genuine Seiko quartz movement
• Japanese assembled


7N32-6

10 ½

2.50

110/65/20

 

yfxw7Fy.jpg

 

if anyone could confirm my findings or have any suggestions that be great thank you

 

MK

Edited by Mkay
MeticulousOne Member

MeticulousOne

Posted
Posted

The top movement thats listed on the Bay is a exact replacement, just put your Dial on it and your good to go.  I not sure, but I think your over thinking it....

Cheers!

Rick

MeticulousOne Member

MeticulousOne

Posted
Posted

I believe those numbers refer to Dial and Case Style, the 5y39 Movements are the same parts.  The Calendar Wheel may be different, but should interchange, use your old Stem from YOUR Case as they will be different lengths and Crowns.

 

Rick

  • 3 months later...
Seikocitizen New Member

Seikocitizen

Posted
Posted

Hi, I have recently acquired the above watch. The question I have is that the battery that doesn't seem to stay in firmly.

 

Does this watch rely on the back plate to keep the battery in position?

 

Regards John

  • 5 months later...
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