Operation of an EL/32W

[orbscure]

Hi guys... I have a World Designs EL34/32W Integrated seen below here at chez orbscure to demo:



However, as it was supplied as seen and without a manual, I need to determine a couple of things before I fire her up:

1. What does the three-position unmarked knob in the centre of the fascia do?

2. What are the two toggle switches on the right-hand side for and how should they be set? Possibly to select triode and pentode modes?

3. Is a .pdf of the manual available please?

Many thanks in advance
Pete