The Omron V-16539-3A5 micro switch is a joystick micro switch.
It is fitted as standard to the Seimitsu LS-32 and LS-40 joysticks.
Attention, It does not equip the LS-32-01 and LS-40-01 models which have micro-switches soldered on a PCB.
The Sanwa MS-0-2P is a replacement microswitch for your TP-MA board on your JLF series joystick.
Replacing a microswitch on your joystick will require some soldering. If you do not feel comfortable with a soldering iron, we would suggest that you purchase the Sanwa TP-MA board..