If anyone has thoughts on this (I knew you would), please chime in. Are there (m)any others like this?
I noticed this anomaly on these photos of a 1924 A-2 black top and wondered how it came to be this way from the Gibson factory.
Here's my guess, for what it's worth:
I'm assuming that this occurred during the time of changeover from the early post spacing and worm-under-post gear configuration (EPS) to later spacing and worm-over arrangement (LPS).
With both sets of drill spacings for their respective matching tuner sets available, I can only assume that after mistakenly drilling the post holes closer to the nut using EPS spacing in the LPS position, the only thing to do was to mount a set of EPS tuners upside down. The difference in post hole spacing would have prevented installing anything else. It looks like they barely got away with it, too, as there's some plate 'overhang'. The outcome of course, is 'reverse' tuners.
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