This is a replica of Seimitsu's SE plate (https://gamesx.com/wiki/lib/exe/detail.php?id=arcade%3Aadaptor_plates&media=arcade:seimitsu-sebases.png), for their small size (P=40) sticks. This includes just about everything they make except the LS-32, LS-40 and Nobi/Bullet sticks. See here for a list (https://gamesx.com/wiki/doku.php?id=arcade:joystick_mechs#seimitsu_40mm_mechs) of compatible sticks.
Seimitsu-SE-P40.jpg
Seimitsu-SEP40.zip