Metal crochet hook with single flattened finger grip in the middle.
https://trc-images.nl/collection_images/hires/2018/2018.1958.JPG#\\TRC-SERVER\TRCSharedWork\TRC Database\collection%20photographs\2018.1900\2018.1958.JPG#
There is are two stamped texts that read: 4 1/2 MORRALL'S GRIPTITE AND PAT. 20090.