This is a charm bracelet; the bracelet itself appears to be older than some of the charms and possibly dating back to the Victorian era. Unless noted otherwise, the charms should mostly all be 9k gold.The clasp of the bracelet may have a different gold karat. The chair is the charm is the Coronation Chair which has been used for Coronations in the UK since 1296. This charm has the commemorative date of 1953 when Elizabeth II ascended; this one charm alone sells for $65 - $200. The medallion appears to be a Victorian antique charm and the others are within the Coronation theme at that time. The estimate is based on this being mostly 9k and utilizes actual recent past auction sales of comparables.