The ‘Unidentified Stamps’ section of the British Armorial Bindings database1 contains over a hundred tools that remain to be pinned down. This is to tentatively suggest an association for the stamp described here, on the basis of a book currently in my collection bearing the same.
Its title page is inscribed ‘S.M. Connell’ or ‘J.M. Connell’.
To my eyes, both names plausibly accord with the stamp. Further evidence would, however, be required to make a conclusive association between the stamp and a particular owner.
Where did you get the book?