as per MVWCNEWS report it might be a STAR, I have to lean towards Stan's report.
American Wrench Makers 1830-1915 by Kenneth L. Cope; page 196
American Wrench Makers 1830-1930 by Kenneth L. Cope; 2nd edition, page 245
shows a wrench that looks just like ours, The Star Bicycle Wrench,
sold by Peck, Stow and Wilcox, Southington, Conn.
also shown in Antique and Unusual Wrenches by Schulz's coptright 1989
p 14 #104 2nd from the top. listed as "skeleton wrench with brass adjustment nut.
NOTE; my wrench also has the brass adjustment nut.