On 23/03/17 11:34, Ron Button wrote:
As probably one of the oldest in this group ,I can recollect back in the
'50 as a young assistant at London Airport (Heathrow to you ) plotting
three hourly charts by hand using two pens tied together ,red and black.

When I started as an observer in '62 at Wyton, I used the the two pens
tied together but on moving to Bedford the following year we had special
plotting pens having a single (red) handle with two nibs. I think they
were of German design - or so I was told.

--
Graham P Davis, Bracknell, Berks. [Retd meteorologist/programmer]
Web-site: http://www.scarlet-jade.com/
Never approach a bull from the front, a horse from the rear,
or an idiot from any direction! [Irish proverb]