This is a vintage gold-tone stick pin featuring an open-work butterfly or bow design at the head.

An unmarked, unbranded vintage gold-tone costume jewelry stick pin like this typically has a modest secondary market value ranging from $7 to $15. 

Value Factors Breakdown

• Brand/Maker: Because it has no maker's marks or hallmarks, it cannot be attributed to highly collectible vintage jewelry designers like Monet or Napier, whose signed butterfly stick pins can sometimes command $15 to $25