In Stock. 45 Day Lowest Price - 100% Satisfaction Guarantee. Ted McCarty's Tune-o-Matic bridge (also known as the ABR-1) started to appear on higher-end Gibson guitars as early as 1954. The ABR-1 was added to the Les Paul Model in 1956 and, the individual saddles to adjust each string's length, as well as thumbwheels to adjust the overall height of the bridge, represented a quantum leap forward in intonation and a marked improvement in tone and sustain. Now part of our proprietary new Vintage Original Spec series - the next step in our journey toward perfection.