New set of metric transposition gears for my SB 10K.
Set is advertised for the SB 9" B/C models.  Because these
models utilize loose change gears to drive the leadscrew, 
a huge number of metric feeds and pitches are possible with 
just the 2 gears provided (127T & 100T) depending on different 
arrangements of the 127T gear, the 100T, and various loose gears 
from the normal 9" change gear set.  The kit also includes
a 6 page general use manual, 5 pages of gear charts, and a 
pictorial set up guide; as well as spacers and 2 sets of studs &
bushings to set up the gears. 

Documentation with the set does not include gear charts for the A
models (QC gearbox, 9A or 10K).  However, the vendor has information 
available and the gears will physically work on those machines.

Acquired from PAE.  New manufacture.  Beautifully made
from a fellow home shop machinist.