This is the Control Board in Case as shown, Model 740 Logix Electronic Control Day Timer ( pn 1242146 but may have 1269121 on back )
Assembly used on the GE Osmonics Autotrol 255, 263 and 268 Valves
using 12 volt transformer on 60 Hz power source ( USA ).
(NOT METERED, that would be Logix 760 or 762 timer
) NOTE: For use on 50 Hz ( outside USA ) you must select the INTERNATIONAL version
Link to Programming GUIDE
740 board can be programmed for softener cycles, or as a "F" backwash only filter cycles.Watch Video to see how Board is Removed and Installed