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Repair of a 1908 Montgomery Ward Keystone parlor guitar. Actually these were considered ŇstandardÓ sized at this time in historyÉ |
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Side crack shows that this is not Brazilian rosewood laminate but solid birch with a really good faux finish- it convinced the experts at Guitar EmporiumÉ |
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Even birch can crack when it is 112 years old. The finish will get some touchup but I will not refinish it as that will take away its character. Sort of like erasing wrinkles. |
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Crack one of two in the soundboard from the inside perspective. That will never close no matter how much I humidify it, but several days of intense humidification inside and out will close the gap some before repairing and cleating. |
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After working a probe and palette knife into the lower bout crack, I was able to realign the bad crack and clamp it before using CA glue incrementally to reattach the sides of the crack. Much better than I expected! |
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Final crack alignment- I worked around it about half an inch at a time hitting it with CA and accelerator at points, then will use capillary action of the thin viscosity glue to solidify the crack. I do not think I will even need to cleat this, though I was prepared to with birch popsicle sticks make into cleats. |
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The finished glue job, now I will touch up the finish a bit as well. |
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Filled with gap filling CA and a razor scraping to level everything before polishing- which will take me through 4 levels of polishing. This is the most time intensive part of the repair. |
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The binding was missing from about an inch and this will take some realigning as well. I will polish out the bad finish but not disrupt it much. |
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Removing the tuners. These will be replaced with a period vintage set I was able to acquire online as these were seized to the point of no return. Any attempted fix would probably leave them unable to tune properly. |
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Even after degunking them they would not turn with pliers. |
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Re-gluing the binding in a couple of places. You can see the crack in the lower bout in this picture as well. Also the center purfling strip was coming loose and had shrunken. |
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This is what 112 year old Adirondack (red) spruce looks like, as best as I can show it. The grain is so tight it almost blends together. The brazing is also from the northeaster forests before they were depleted building airplanes for WW2. |
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The two cracks in the soundboard after about a week of humidification closed up considerably. I had considered filling it with a long thin strip of spruce, but will go with a mixture of spruce dust and glue. |
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After touching up some of the dings and scrapes in the finish it is looking pretty good. I do this with fine tip permanent markers, furniture touch up pens and even a super fine brush and artistŐs gouache. ItŐs tedious but it words and does not disturb the original finish much. |
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The side lower bout crack is looking pretty good at this stage after re-polishing multiple times. |
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Preparing to glue the cracks. A band clamp usually will pull any crack together but this one is stubborn. I have used several luthierŐs magnets to cleat this from the inside with 6 inch long half inch wide cleats. This will never open along theses cracks again. I normally use smaller cleats on closed cracks. |
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Clamps, clamps, magnets, and more clamps. I use leather to protect the surface and wax paper under the blocks required to keep the soundboard level during gluing. |
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This crack is almost closed at this point. |
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Forcing the glue into the joint with a suction cup, an old Frank Ford technique. It works as I got squeeze out inside which I clean with a damp towel. |
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I work along the crack and will come back later to hit the spots covered by the magnets and clamps. |
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Leveling and gluing and cleating the cracks in the soundhole; I used small spruce cleats here- these have grain that runs perpendicular to the crack so it will not be able to expand again. Lool at that Brazilian rosewood in the fretboard- along with the bridge, that is the only Brazilian on this puppy as the back and sides are birch. |
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Filling the remaining crack with spruce dust and glue compound. I will shave this after dring and apply color and finish just along the crack itself. |
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After filling, before touchup. |
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Magnets to hold the cleats while drying. These are extremely powerful rare earth magnets. |
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A view of the long spruce cleat. |
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Note that the grain runs perpendicular to the soundboard grain. |
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Working on the center purfling that a gap appear- apparently because it had had shrunken. |
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I used aliphatic resin glue rather then hide glue on this repair. |
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Using cherry cauls to keep the surface flat while clamping and gluing. |
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Wax paper just in case of squeeze out- this will make for easy cleanup. |
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I have an assortment of hardwood cauls for every occasion. |
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Filling a gap in the rosette with a sliver of spruce then shaving it off.. |
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Re-scraping the filled cracks with a razor blade scraper. |
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The lower bout back crack closed before buffing and polishing |
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The period tuners that replaced the originals. These are twinsies of the originals, probably made by Waverly. |
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Touch up and colorizing the fills. |
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A bit here a dab and a smudge- this is an ad hoc process and works well. |
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Initial buffing with coarse compound, will work through medium and fine then use Preservation polish to finish it off. |
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I have a bit more colorizing to do but wanted to show the progress at this stage. I used extra light Elixir strings and it sounds great. |
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The action is still way high so the next phase will be a neck reset. I am very pleased with how it turned out cosmetically |
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Original ad for the Keystone in the 1908-9 edition of the Montgomery Ward catalog. Several companies were building guitars for the company, mostly Lyon & Healy at this time. Ths model was gone from the catalog by the 1912 edition, replaced by a solid mahogany version based on the same design. |
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