[julie_m]

Yes, exactly. Valve pins are numbered in the same fashion as IC pins; increasing anticlockwise from the break, as you look down into the valveholder. (This sounds a bit wrong, because valves were around before ICs, but you know what I mean; semiconductor manufacturers just adapted the existing numbering scheme for valve pins.) However, valves are conventionally viewed from underneath the chassis; so on this side, the pins numbers increase clockwise from the break.