| Looks like a BB of some kind. Not a Yamaha expert, but it looks like the bridge was changed out for something else.
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Birdsong Skyrider 9K-001P, Birdsong Sadhana 10S-006, Aria Pro II Cardinal CSB-450, Gretsch Electromatic Jr., Squier VM Jag SS (red!), Yamaha BB300, Univox Hi-Flier, Birdsong Club Member #33
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