Your brooch appears to be from the Victorian era (c. 1890). This piece was probably made by machine, and then finished by hand.
This type of jewelry was often made in Birmingham, England. The swallow motif was popular during this time period. Other popular motifs include hearts, flowers and sentiments (e.g, Mitzpah, Forget Me Not, Best Wishes, Mother).
This type of jewelry appealed to the "working classes" as it was relatively inexpensive. The use of silver and machine-aided manufacturing allowed these types of articles to be priced affordably. Prior to this time period, jewelry was usually reserved for the wealthy upper classes.
Personally, I like the quirky nature of the Victorian silver items and think your brooch is quite nice.