Top Plate Model 255 Valve Logix Series timers 1235340 used on all 255 valves made to use Logix control boards that "clip" onto the front and use the rear drive motor.,
REQUIRED accessories ( you should already have ) to use with this top plate.
1 ) One Piece Spring, AP1235341
2 ) Cover new 400 Series, AP3019870
3 ) Camshaft bearing, new style, AP3019873,
( And of course you would re-use your Logix version camshaft, AP1235353 and drive motor / optical cable AP1235361 ).