Import replacement throw off for older Gretsch Catalina Club Snare with inward facing mounting brackets.  Verify in the pics that you have the same mounting bracket positions as there are two different Throw-Offs:  Inward facing or outward facing.  Also, when mounting on your drum ensure that your mounting screws are not too long so they don't interfere with the mechanism.  Mounting screws are not included.

Replacement for Gretsch - Snare Throw Off inward mounting brackets - PROCAT - Catalina Club