QUOTE(belfast-popeye @ Feb 4 2008, 07:15 PM) [snapback]502994[/snapback]
Cleaned out a Duofold striped senior vac, 1942 plastic filler, which i picked up recently. I was just looking at R.Binder's diaphram size chart and he lists a debutante diaphram as being correct size for ALL striped duofolds, however, the pen sac co lists a standard diaphram as the correct size for a senior duofold vac. So how do i know which is the right size to use?

Use the Deb, the only pen I use the Standard in is a Maxima Vac. The OS diaphragms are only used in OS vacs.
Cheers,
Sean