Made by: Ruttonsha Simpson Private Limited
This model ships with both batteries, probe set, and an operators manual.
The Simpson 60A has a plain 100 degree dial.
Probe set used: Simpson Catalog Number 02055.
Controls include: Ohms adjustment, and a 20 position Function / Range selector switch.
Six recessed probe jacks are used. Note the DC polarity switch is not used on this model.
To remove selector knob, remove back cover, rotate knob to the 1000/ 250 VDC position,
and loosen the set screw through the small slot at the bottom of the clear front cover.
No fuses are used, protected from overload by internal circuits.
The back cover on this model is smooth and marked "Ruttonsha Simpson Private Limited".
Under that it is marked "Made In India"
More inside views linked below.
Uses two batteries, one 1.5 Volt AA and one 22.5 Volt (NEDA 221)
Remove back cover and then metal bar and insert positive terminal up.
Size: 4 ⅝ " x 3 ¼ " x 1¾ " Weight: 12 Ounces
Simpson 60A Specifications
Ranges 250mV, 1V, 2.5V, 10V, 25V, 100V, 250V, 1000V
Accuracy Unknown * Sensitivity 20K per volt
Ranges 2.5V, 10V, 25V, 100V, 250V, 1000V
Accuracy Unknown * Sensitivity 5K /volt
Rated Circuit-To-Ground Voltage 1000V AC/DC Max.
Ranges 50μA, 1mA, 10mA, 100mA, 250mA, 1A
Voltage Drop: Unknown
Ranges Rx1, Rx10, Rx100, Rx1K, Rx10K
Here are all four, The Simpson 60A, Simpson 160, Simpson 160 Run II and the Simpson 165.