Number stamped underside of the sound-board
I recently had the opportunity to look inside my newly acquired 1937 Gibson F-7 using an endoscope (my luthier has one but they are available cheaply on Amazon).
I noticed a number of some sort stamped on the underside of the sound-board. 1261C. The serial number , by the way, is 94366.
Any ideas what this is about? I can't find any existing thread on the topic, but I guess not everybody gets to see deep inside of their mandolin!
2016 Gibson Sam Bush F5
1937 Gibson F-7
1920 Gibson F4
1919 Gibson H1 with virzi
1959 Gibson Les Paul Junior
1956 Gibson LG1
1925 Gibson TB-1 trapdoor b**jo
Some other stuff made by National, Randy Wood and other cool people.
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