SFG-2 (probably 1970s or early 80s), still perfectly operational.
Includes original box, aged but intact, different printing from current
production box. Still trustworthy over cheap digital gauges.
"The Shure SFG-2
Stylus Tracking Force Gauge is the industry standard. This simple-to-use
measuring device was developed to give listeners a way to insure against the
problems caused by improper tracking force settings, which include
mistracking, excessive record and tip wear, and poor sound reproduction.
This gauge is a highly accurate beam balance instrument designed to measure
the actual downward force exerted by a stylus on a record over the range of
0.5 to 3.0 grams. Each gauge is individually calibrated, and displays
readings in 0.05 gram increments in order to provide a precise measurement
of stylus tracking force."
Since force is
measured with the tonearm in its actual playing position, use without a
record when measuring. If with a felt mat that's too soft, replace
with a record or layers of records to approximate very closely the height of
Read review by TNT-Audio. There are some notes under
Complaints section that are important to remember, regarding gently
tapping of the cartridge.
including User Guide at Shure website.