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There is a narrow section of time where tritium replaced radium as a lume, and it is much less of a theoretical health concern. Benrus tritium watches have a small “T” visible above the 12 on the dial, and other makes may have “T Swiss T” at the bottom of the dial. Although these are from the 60’s and newer, there are still some with vintage styling and parts are often more available than older movements. -
Turns out I also need a balance complete for the Marvel. I discovered a crack in the hairspring collet and so can’t adjust the beat error. The balance for the 560 (part number 310570) is in stock but not sure if it will fit. Any idea? -
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Thanks for the answers. In my case space is very limited: I only have the kitchen table on evenings. This is why I am considering a mostly water-based system (keeping heptane only for balance complete and pallets) and no cabinets, no big machines. Any advice for water-based detergents that I could procure from Sweden (ordering from Cousins is OK especially for non-hazardous liquids because normal shipping would be used). Should I really get an ultrasonic for those or would it also work by hand? Thanks! -
I'm glad it worked out well for you. Must feel good to learn some new watchmaking black magic huh? 😂 Can you post a photo of the crown after all this, I'm a bit interested in how it looks compare to how yellow it was before, never thought alum could dissolve oxidation as well, maybe I can work out the chemistry behind it, something to do with the electrochemistry list, but I'm too lazy for it so 😂 you are lucky it was only yellow, the layer must be so thin it didn/t damage the finishing enough to be noticeable.
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