I have a vintage gibson catalog from the early 1920's that I aquired 20 plus years ago. I use the catalog in my repair shop as a reference. Included with the catalog was a gibson custom banjo flyer, a gibson accessory catalog,and the 1923 gibson service handbook. I saw a 1923 service handbook on the mandolin archives web page and they stated that it was the only one they have seen. I have one too. How can I find a value on the service book? any thoughts on this would be appricated. thanks
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