IDEAL RELOADING TOOLS
No. 3  SMALL DIE
Seen in 22-10, 22-15-60, 22-20, 25-20 Single Shot, 25-21, 25-25
"25-25" overstruck on "32-20"
Bullet Seating Die marked "9-20", rare Neck Resizer "25-25
"
Have not seen these instruction displaying the small die version.  This one came with the set.
Scarcer calibers:  22-10, 22-15-60 and 22-20.  
These dies will not fit the current Lyman 310 handles.
Two variations on the 22-20, which was also called the "Harwood Hornet".
Note the turned down spigot  on the first example and the "H" on the second.
22-10 (Die also so marked - 22 WCF?)