Found this, may be of some interest
sorry no date but it looks like something from the 1960s 70s, going by the print quality
now added a few more pages of an earlier aga sunvalve manual, I have not actually seen one with straight glass sides. I have a few VS10s and also an odd Barbier sunvalve and a Chance one with vials of what looks like alcohol in them. I would love the manuals for these later two.
I will post more in the nearish future.. enjoy fellow lighthouse nuts