Up for Buy-It-now is a new old stock temperature sender switch (engine unit), Delco-Remy part number 1993409.  According to my GM manuals, this is used on the following models and years:

1970 Chevrolet Passenger/ T.H. 400 (400, 454), 2nd design
1970 Nova (396) (except front comp console instr. cluster)
1970 Chevelle (8 cylinder) (2nd design) (except 307, 350, instrument panel gauges)
1970 Camaro w/ Hi/Per 396 (2nd design) (Except instrument panel gauges)
1970 Camaro w/ Sp. H/Per 396, (Except instrument panel gauges)
1967 Chevrolet Passenger (6 cylinder) (2nd design)

  The switch is in brand new, never used condition and is free of any damage. Painted on the switch in red is 409, 9E7. The original box is in good condition.  Please feel free to E-mail me questions.  International bidders are always welcome.  Thanks for looking!