This is an NOS Ford Motorcraft Back Up Light Switch for a  manual transmission. It has part numbers SW-1835 and E3TZ-15520-B 

THE ID NUMBER IS : E3TR 15520 BA 

THIS FITS:

1978  1979  1980  1981  1982  FAIRMONT 4 SPEED M/T ( SROD )

1980  1981  1982  GRANADA  4 SPEED M/T ( SROD )

1979  1980  1981  1982  MUSTANG  M/T ( SROD )

1980  PINTO  OR  BOBCAT   4 SPEED  M/T ( SROD )

 1981  1982  LYNX  4 SPEED  M/T ( SROD )

1980  MONARCH  4 SPEED  M/T ( SROD )

1978  1979  1980  1981  1982   ZEPHYR  4 SPEED M/T ( SROD )

1981  1982  1983  FULL SIZE BRONCO  4 SPEED M/T ( SROD )  ( 4 X 2 )

1980  1981  1982  1983  F SERIES TRUCK  4 SPEED M/T ( SROD ) ( 4X2 )

F150  F250   F350

Nothing beats the quality and fit of a genuine Ford part for your car or truck. Please use part numbers and picture to verify application. This may fit other makes and models not listed above. Please check your application. This NOS part is in excellent condition from dry storage.  Please email with any questions.