My February/March '69 dated tag, original, on my Z11 03D, I think I've got an earlier tagged spare I bought at a local swap meet some years back tucked away in storage. Never seen a 5605 motor without the part number stamped on the end frame. This motor also has the part number ink stamped in yellow on the side of the motor case,
Original dated solenoid coil part number is shown, apparently batch made in groups for the three models that offered the headlight washer system in '69; Corvettes, Caprices and Camaros. Finish on the coil frame is zinc dichromate. Wiring goes underneath the motor.
Refer to the pic for an HOS coil for proper marking and finish.
Regards,
Steve