Nabco/Nabtesco was one of the two OEMs Nissan used to produce the brake and clutch operating cylinders for the S13/14/15 platform, Tokico was the other one. Tokico no longer produces these for Nissan, all of the genuine new Nissan units left are all made by Nabco. 
 
Nabco clutch master cylinder -- This replaces genuine Nissan part nunber 30610-70F50
 
These fit to the following vehicles:
1989-1998 240SX (LHD)
 
 
Fitment to RHD is not verified and not guaranteed.