Leader - Lag-27 Audio testing equipment

2 x Leader LAG-27 Audio Generator:

1 x classic analog test instrument used for generating sine and square waves in electronics and audio engineering
A tone generator that produces test frequencies for measuring audio equipment, such as amplifiers and loudspeakers.
Adjustable from x1 to x10, providing a frequency range of roughly 10 Hz to 1 MHz.
Dimensions: 150x250x130 mm W x H x D.
Weight: 2.5 kg.
Origin: Japan.
In very good condition and working (see the first 8 photos).

1 x the same unit with a missing side plate.
This unit is operational but needs maintenance or can be used for parts (see the last 3 photos).