I have just received this rather nice little set from our NZ auction site. I think it's a 44 but that is really just a stab, it has no numbers at all. It's my first Burnham. Unfortunately the pen is too small for me to use (110mm capped and slender with it), and not the focus of my collection, so I may sell it. There is no sign that it has ever been used, both are absolutely mint and the pencil still has its spare leads. The presentation box is crushed but repairable.
Lifting the lever has that familiar crunching sound so I know the sac needs replacing but I cannot seem to open the pen, something I have never encountered before. There seems to be a trace of something at the join, does anyone know if these pens had a sealant or adhesive applied to the section joint? Also, is the join friction-fit or threaded?
And from a collector's point of view, how important is it that the sac is replaced anyway?