- Early 20th century plique-à-jour enamel and diamond butterfly brooch, c.1905, converting for wear as either a diadem or a hair comb,
- Early 20th century Russian diamond scroll collar necklace by Vassily Finikov, St. Petersburg, reputedly by Bolin and gifted in 1905 to Duchess Cecilie of Mecklenburg-Schwerin, converting to a tiara,
- Pair of early 20th century diamond pendant earrings, c.1915, a principal old European brilliant cut diamond of approximately 2.15ct hung to each,