Sorry to butt in here, but that's a curious find for V Boffo - the last date in the Whitefriars workbooks if I have read your link correctly? was June 1970, yet in Mark Hill's book he says
'This had been anticipated before he left England and in October 1969, the team of twelve was joined by Ettore Boffo and his father Vicente (also known as Poppa), who were both experienced blowers from Whitefriars.'
So if it is the same V Boffo, and I assume it is, then either he was working in two places at the same time, or the dates in Mark Hill's book aren't correct...or the entry in the workbook for V Boffo aren't correct. Or did I miss something somewhere on timelines?
Edited to add...I know nothing about how 'workbooks' work, so is it that they don't represent the output of production for the date in question, but the sales throughput? In which case I guess they could represent sales of items made at a previous time? But if they do represent production for that month then my previous questions stand
Further edit...Mark Hill's book page 23 shows a photograph taken from 'Times of Malta' May 12th 1970 with a picture of Michael Harris and Ettore Boffo - perhaps Vicente Boffo joined later?