Details tune-o-matic bridge (continued) and stop tailpiece
1980 Gibson Sonex owners manual - page 9
Guitars and Parts for Sale
Continuing from the previous page with details of the tune-o-matic bridge and it's role in setting intonation - also the stop bar tailpiece. Both are fully adjustable.
The tune-o-matic bridge was designed for string changes (gauge or type), not for changes in intonation due to string wear.