Couple of different collet Chucks, one speed chuck and the other lever action. Both used on my Sheldon 10″ EXL.
Ortlieb Lever Collet Closer
Ortlieb Lever Collet Chuck 
Steel Collets 
List of Rubberflex Collets 
Type 30 
Mount Hardware for Sheldon EXL 
2 1/4 x 8 Threaded Spindle 
Closer and Collets 
Collet in good shape 
Two Collets worn but each of them have a corresponding good one. 
Hole for spanner wrench bad but usable. Suggest drilling a new one.
Jacobs Model 50
Jacobs Model 50 
Jacobs Model 50 
Closer look 
2 1/4-8 threaded spindle 
Couple of small nicks 
Nick 1 
Nick 2 
Extra Collets above and beyond full set 
2 1/4-8 Spindle