Type #1 mortise cam, used with standard mortise locks, including Marks. 

There are more than 17 different cams available.
Type #2 is used with Adams-Rite Locks.
Type #5 is used with Marks mortise locks. 
We do not stock are varieties, lead time may be 2-4 weeks

Related mortise lock cams:

#1 cam (863G)  Standard, most common 
#2 cam (863A) is used with Adams-Rite Locks. 
#5 cam (863F) is used with Marks mortise locks. 
#18 cam (863R) is used with Lori Deadbolt Lock