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Guido

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  1. Open centre seem and low fingerboard projection not worth repairing; less than nothing.
  2. Ten years ago you mentioned you had the 2002 catalogue. Would you be able to share the bow pages? I’m sure someone would have told them to drop the OR Pfretchner line as that was just a bit too funny. But maybe they kept the Hoyer and other lines all along?
  3. Thanks @GeorgeH. Very informative, albeit not exactly what I had hoped to see. Does anyone know how they faired during and after the war and when/how they resumed trade with Germany. Maybe any catalogues from the 1950s/60s around?
  4. Would be interested specifically in their cello bows both Nürnberger and “Robert Hoyer” (trade name).
  5. Would anyone have any old catalogs from the Juzek company as pdf and would be willing to share? Maybe PM. Or someone can post some pages here, I’m just after their bow offerings really.
  6. That is a really good analogy. I’m not familiar with this though, and would guess that the water swells the wood as an important part of the procedure? Also, did they heat (dry) the wooden wheel or just the iron tyre?
  7. I don’t think you get a noticeable expansion in the metal, the wood is what you want to change. And it is not so much the heat (which expand everything incl wood), but the moisture content that is reduced in the wood to make it shrink.
  8. I operate in Celsius… kept it under 100, maybe 80. Still had some thin gloves on handling it while warm. I suppose you can try hotter and shorter or cooler and longer. The objective is just to “dry” the wood core and make it shrink a tiny bit.
  9. I find rings come lose and tighten again with the seasons as the wood core expands and contracts. Sometimes I just wait for the weather to dry/warm up before I attempt to realign or take off and refit a misaligned ring. I have had good success baking the adjuster for a couple of hours on very low heat in the oven if I don’t want to wait for summer.
  10. Can anything be said about when and/or where metric bow screws were used?
  11. My favourite bow of 40 years I dropped and broke the head off 30 years ago. Was repaired and played ever since with no difference at all. While it lost 80% of its resale value, utility has remained unchanged. To acquire such a bow would seem a great bargain and for the same reason I would never sell it. But maybe I’m just lucky or oblivious to the risk of future failure. As an economist by trade I will say that there must be a reasonable reason for the typical devaluation. No free lunches anywhere.
  12. Got my own box with this designation, in which this bow has lived for an unknown number of years. Just thought the head looks somewhat interesting…
  13. I guess it's an old German bow, but I can't tell if it is indeed rather early (e.g. from the Knopf woods), or a later so inspired version. The head has a curious shape and rather broad cambers - might ring a bell somewhere? Any opportunity to learn appreciated.
  14. Actually looks more like casein formaldehyde (6), but I still don't discount horn (1) based on the tiny sample in this study. Might be good to know if any of these are not suitable for bow frogs (e.g. strength), or what was actually mostly used for frogs and reasonably available to bow manufacturers at various times.
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