A group of three pendants

A group of three pendants, early 20th century, comprising: a double-sided rock crystal reverse intaglio pendant with the alphabet in international maritime signal flags, backed in mother of pearl, mounted in gold, length 2.7cm; a heart-shaped rock crystal pendant, length 2.4cm, fitted case stamped Peake, dated 1912; and a gold pendant of geometric design centred on a circular-cut aquamarine issuing foliate motifs set with seed pearls, to a fine belcher link chain, pendant length 4.9cm including bail, necklace length 41cm, case