This page continues describing some of the features common to numerous Guild guitars: SP-6 tailpiece / Adjusto-matic bridge / Knurled control knobs.
SP-6 Tailpiece & Adjusto-Matic bridge are described as follows:
SP-6 TAILPIECE & ADJUSTO-MATIC BRIDGE Revolutionary Guild inventions in hardware. The SP-6 Tailpiece, Is nicknamed the "Quick-Change," because it allows strings to be changed in less than 2 minutes, and doesn't fall off while you're doing It. Our Adjusto-Matic bridge simplifies action adjustments by allowing tuning of any combination of string gauges separately. Features individual adjustments for string height, spacing and intonation.
$500
$68
$750
$2200
$1200
$1189
$799
$8000
$830
$1000
$4350
$60
$1380
$1499
$2150
$1379
$2699
$3000
$2199
$550