Jump to content

My first Gruens. Precision 510 and N510R movements.


Recommended Posts

Apparently it's James Bond's choice of watch!

Picked up this pair at an antique/estate sort of shop near me. The owner asked what I was looking for, and when I said wristwatches he pulled out several Ziploc bags full and let me dig through them. I picked up this pair for a nice price.

One case is in pretty rough shape, the other looks fairly good. Both movements seem reasonably clean, and the balances swing easily when I wiggle the watches. Interesting that one is shock protected and the other isn't.

I'll post more when I get around to working on them, but for now:

20231229_234420.thumb.jpg.ba5168e6dc12fa53c55b5e18fa2fbeb4.jpg20231229234657812.thumb.png.48b28e414c3dc50e942e0fe8280dd4f7.png20231229234904211.thumb.png.c5d0f53b71ab73df5db437ba52868701.png

 

A couple more inside the backs. Looks like service marks in one from 78 and 88.

20231230001647876.thumb.png.2690375823f20d9ad022848648b8f2eb.png20231230001714706.thumb.png.55f2ed040eb73c8f4634e8a47bfe08fc.png

  • Like 1
Link to comment
Share on other sites

  • 3 months later...

Finally getting these guys in the repair rotation.

I'm starting with the N510R, since it's shock protected and will be less prone to damage on my clumsy wrist 🙂

Dial side

20240425102209826.thumb.jpg.9046b9510b5fbb8e35697366a3a1a04b.jpg

Trying to keep track of the different bridge screws. One is missing, and I don't want to steal it from the other 510. Maybe I'll find a donor movement, since I need a stem or two anyway.

20240425103059088.thumb.jpg.15e21e38a9ab89f4c8e757bd57c5b830.jpg20240425103457492.thumb.jpg.01b89aaf1f53fc6767e9788630bc345a.jpg

 

Left-hand wound mainspring! Don't forget that when putting it back...

20240425104228203.thumb.jpg.e90ff944873c83fa27db61cf4269029a.jpg

 

All ready for a bath

IMG_20240425_104405.thumb.jpg.c7f61d22536bab2ff27184ba1f3e4204.jpg

  • Like 1
Link to comment
Share on other sites

Snap!

I recently finished my Gruen 510 movement - though the case for mine is in a rather sad state; I'm going to try re-plating it (in nickel, it's not a gold one).

IMG_2370.jpg.9ef3d7e4eb196db136aa340b691f00d6.jpg

 

Re. the screws, I got a few of the one gram mixed batches from ebay. I've only needed a couple of screws for things so far, both rare, minuscule types - but both in the mix, after enough time sorting through them! The ones such as normal bridge screws are quite common in those lots.

 

  • Like 1
  • Thanks 1
Link to comment
Share on other sites

  • 2 weeks later...

Still haven't gotten around to getting stems or screws, but I did make my first attempt at polishing a case. I just used a soft mop and rouge to reduce my odds of ruining them, and I think they came up pretty nice. Also gave the crystals a polish on the same wheel while I was at it. They were both very badly scratched up.

The one on the left is fairly beat up, but it'll still make for a decent presentation.

IMG_20240507_181921.thumb.jpg.9ff28fd24db846aaf22c228c4062fbdb.jpg

IMG_20240507_181934.thumb.jpg.a995d6eba348dd0a75d986456dcce426.jpg

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.



  • Recently Browsing

    • No registered users viewing this page.
  • Topics

  • Posts

    • Learned a new thing today! 🤓 Looked this up and found this informative document: Watkins-MainspringGauges.pdf
    • Correct one dip is expensive when the chemical is purchased as " one dip " which is why it is mostly reserved for these two small parts as far as information tells us it is mostly tetrachloroethylene. I use it bought as perchloroethyl used in dry cleaning processes, i cant say I'm overimpressed with it though it appears to me to be shellac safe. What may be a better solution for hairsprings is a high lab grade of pure benzine.  IPA is mostly used as a rinse and water displacer and yes it does have the potential to dissolve shellac, personally i would not buy anything that has significant water dilution so 99.9% IPA is the way to go. And lastly the part you are cleaning dictates your choice of cleaning brush, delicate parts like a hairspring requires the finest artist's brush you can find. Plates and bridges can take a little more scrubbing, but always check to make sure the surface is being unharmed. And dont forget a stick of tip benzine soaked correctly shaped pegwood is your mate set up for cleaning dirty jewels and removing stubborn dried up lubrication. 
    • Hello and welcome from Leeds, England. 
    • Den / Dennison is a unit measurement of size this is actually a mainspring gauge . I haven't heard of a pivot been measured in Dennison before.  Though the small thickness gauge is  usually supplied with a Jacot tool and is more accurately known as a pivot destroyer.
    • Could it be an abbreviation for Denier? "Denier (/ˈdɛniər/) or den (abbreviated D), a unit of measure for the linear mass density of fibers, is the mass in grams per 9,000 metres of the fiber. The denier is based on a natural reference: a single strand of silk is approximately one denier; a 9,000-metre strand of silk weighs about one gram." The pivot gauge looks interesting, however I wouldn't trust myself to drive a pivot into a wedge incase it jams and gets damaged/snaps trying to get it free. More a comment on my ability and incompetence than the quality or design of the tool 🤣
×
×
  • Create New...