Found one of the tables, it's in French but easy to figure out.
If doing the test spring process, the formula is K=K' (D/D') 2
K is the CGS number you're looking for
K' is the CGS of the spring you test
D is the diameter of spring you need, at the pinning point
D' is the diameter of the correctly vibrated test spring at the pinning point.
Sorry to the OP Joe and I are hijacking the thread a bit, maybe a mod could move it to a new thread?
do you think the vinyl housing will be ok to reuse. doesn't seem to have any glue / cement used or am I wrong there? - see pic.would one of the ebay watch pressers do an adequate job? (not the best option I know but this may be a one-off job)