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Baume & Mercier - AS/5008 - Left wound spring

sstakoff
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sstakoff WRT Addict

sstakoff

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Stripping down my B&M Capeland (I will be posting many photos to the walkthrough forum when done). One little surprise - one of the the barrels (there are 2) has a left wound spring. Of course, my Bergeon winders only have right winders (plus a #15 left that I purchased for a pocket watch). I plan on ordering a left winding arbor next week. Beside hand winding - which I really don't want to do - anyone have any other techniques? I though about using a right winder,  and inserting it into an old aluminum mainspring retention ring (like those that new springs are shipped in), flipping that upside down and pushing it it - like you would for a factory new spring.

I need to hit the supply house regardless since the bridle on this particular spring broke :(

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    • nevenbekriev
      Hamilton Khaki Mechanical / H-50 winding issues

      By nevenbekriev · Posted

      Hi and welcome. First of all, check the power reserve. If the watch is runing, this means the spring is attached to the barrel arbor. If there is no end of winding, this probably means that the spring is not attached to the barreland it's outer end is slipping. In such case, the watch will run, but the power reserve will be small - about several hours
    • watchweasol
      Hamilton Khaki Mechanical / H-50 winding issues

      By watchweasol · Posted

      Hi welcome to the forum. One can only reiterate the diagnosis already made by clockboy mainspring problem. But before tearing it to pieces take a little time to read the attached file to acquaint yourself with all the various parts. TZIllustratedGlossary.pdf
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      By Geotex · Posted

      We think about these preps as "one-dips" partly because they are terrific solvents but also because the parts they are used on are often cleaner in general than many other parts. But old oils petrify, and even something like B-Dip can't clean up over-soiled parts without some extra effort, as mentioned above. There is an intermediate step during cleaning where the solvent can partially dissolve tarry residues so they have a more liquid varnish-like consistency, and that could well be what you are seeing on the coils after two washes. I wouldn't worry that your B-Dip was contaminated before you used it on this hairspring, but it I wouldn't re-use that aliquot AFTER this cleaning!
    • clockboy
      Hamilton Khaki Mechanical / H-50 winding issues

      By clockboy · Posted

      Welcome to the forum, enjoy.. Normally if a hand wound watch does not fully wind ie just keeps winding there is an error with mainspring, either slipping around its winding arbour or the mainspring is broken. 
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