Produced: 1960's, shown in catalogue list 41 (undated) and produced as a 5 piece set.
Pieces:
Tray
Lidded pot with tall finial
Candlestick
Pin-tray
Known colours: Flint (clear), rosalin (pink), green, amber,
Notes: I have not yet found a usable image of the 2707 trinket set in the catalogues but I found a 2707 bowl in the 1960 catalogue which matches the pattern of the base of a labelled Sowerby set (Mystery #175), which indicates this is the 2707 set.
Credits: Mike Tomlin of the fabulous Victorian Pressed Glass website for the catalogue image. Jayne C Morgan, Wenfael, Hammers161, Fred Cooper for photos.