Chatelaines are extremely collectible.

“The original chatelaine's were used in castles or forts and the chatelaine's duties were many. To complete them, she certainly needed keys. In the 18th century, the word chatelaine (borrowed from the French châtelaine) took on an additional meaning in English that alluded to this: the word came to be used for a decorative clasp or hook from which chains holding a watch, purse, keys, etc. were suspended. These popular accessories evoked the bunch of keys the original chatelaine had worn of necessity.”

On the antique market they sell from $1800 to $75. Given this one is 14 KGF it has more value then the more common sterling silver. Here’s an example of one on the high end. There are many reproductions being sold as antique. If the price is low they’re probably copies

example 1

Measures approximately 36” to the bottom of the heart charm