I spent 15-20 minutes looking for something that resembled the (I'm guessing) handle you found, no luck. Below is just some related reading, I know sometimes (for me) it's interesting to learn a little about something you've found.
Manufacturer: HSB & Company Site of Operations: Chicago, IL
Founder: William G. Hibbard Website: n/a
Parent Company Hibbard, Spencer, Bartlett & Co Notable Lines/Models: Our Very Best (OVB)
Tricycles Made Since: 1855 (founded)
Still in Business: No
COMPANY HISTORY:
William G. Hibbard started out as a hardware salesman. In 1855 he started his own company, merging with his former employer, Brown & Tuttle Hardware. Hibbard's business grew rapidly and soon he had his own company. Spencer and Bartlett later joined him, thus the HSB & Company. HSB manufactured and sold all sorts of hardware including tricycles. The "Our Very Best" line was one of their house brands and a leading seller. HSB & Co. was sold to Cotter & Co. in 1962.
http://www.tricyclefetish.com/hsb_co.php
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Was there a firearms company named H S B & CO?
http://answers.yahoo.com/question/index?qid=20070121071740AArPRuO
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Interesting read:
http://www.thckk.org/history/hsb.pdf
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