General Specifications
Inputs: balanced mic <-65dBu (1kOhm)
           balanced line <-30dBu (50kOhm)
           aux return <-15dBu (10kOhm)
Equaliser: Bass ±15dB @ 45Hz
           Mid ±15dB 330 - 6.5kHz sweep
           HF ±15dB @ 11kHz
L&R Outputs: +4dBm 600 Ohm min load
                    max output +21dBm
Aux Outputs: +4dBm 1kOhm load
                    max output +21dBm
Fader type: 100mm sealed carbon track
S/N Ratio: All outputs at max, -84dB
            All ch to mix, unity gain, -74dB
Unterminated equiv input noise, -127.5dB
T.H.D: <0.03% @1kHz,<0.04% @10kHz
Headphone Out: mono mix, 1.7W max

Click here for Seck support and spares, salvaged / reclaimed parts

Seck mixing console
12 channels for mic (XLR) or line (jack) inputs, each with phantom power, gain, insert, 3 band EQ (with mid sweep), 4 auxiliaries, pan, solo, 100mm fader.
Left and Right XLR outputs, 2 FX returns, LED meters, two headphone sockets, external power supply (PSU), hinged handle, all aluminium housing. 

6.2 Mk1 model has identical layout, but with 6 input channels.
6.2 Mk2 model has identical layout, but with 6 input channels.
24.2 model has identical layout, but with 24 input channels.

Free data sheet for the Seck 6.2 Mk1
Free data sheet for the Seck 6.2 Mk2
Free data sheet for the Seck 12.8.2  
Free data sheet for the Seck 18.8.2