Lumley Reference 120 Monoblocs

[Kite 404]

I have just recently bought a pair of Lumley Reference 120 Monobloc amps.
They are working fine but I have no manual or any other information about them.
Does anyone have a manual or schematic or indeed any information about the amps. They may need service at some point so anything would be useful and much appreciated.

 

[Bumble 1]

I have the manual for the ref 120 ... I also have the amps

 

[Bumble 1]

Here are photos of the pages if these help.. the Bias setting is for the mk1 50mv . But I usually set to 70% of that 35mv with good valves. Mk 2 amps ' I believe is 37mv.