Information on Corbin Russwin Grade Two locksets and leversets can be viewed at:

CL3900 Standard Duty Key-in-Lever Locksets:
http://www.ysgsecurity.com/library/catalogs/CorbinRusswin/pdf/45037.pdf

parts manual at:
http://www.ysgsecurity.com/library/partsmanuals/CorbinRusswin/pdf/3900pm.pdf

CL3700 Series Light/Medium Duty Lever Locksets:
http://www.ysgsecurity.com/library/catalogs/CorbinRusswin/pdf/45038.pdf

CK4400 Series Standard Duty Cylindrical Knob Locksets:
http://www.ysgsecurity.com/library/catalogs/CorbinRusswin/pdf/ck4400.pdf

CK4700 Series Light/Medium Duty Knob Locksets:
http://www.ysgsecurity.com/library/catalogs/CorbinRusswin/pdf/45026.pdf

.