These magical wrist bands are indistinguishable
from normal, non-magical protective wear.

When worn by a character
type or creature able to employ a bow, they enable the wearer to
excel at archery. The bracers empower such a wearer to use any bow
(not including crossbows) as if he or she were proficient in its usage, if
such is not already the case. If the wearer of the bracers has proficiency
with any type of bow, then he or she gains a + 2 bonus for hit
determination and a + 1 bonus on damage inflicted whenever that
type of bow is used. These bonuses are cumulative with any others,
including those already bestowed by a magic bow or magic arrows,
except for a bonus due to weapon specialization.

Bracers of Archery, Greater (OSRIC.332)
Bracers of Archery, Lesser (OSRIC.332)