A lovely art glass vase, designed by Frank Thrower and made by Dartington, Devon, England. The design originated in 1968 and is FT58. 
It's a rectangular block with a raised Greek Key pattern to each side, and a tall round contrasting rim. It's in the Kingfisher Blue colour, a light turquoise cyan tone, which was in production from 1967 to 1973, so dating from this six year period. This is the smaller version of the FT58, the 5.5 inch version. Vintage Dartington glass pieces are 24% lead crystal.
It's in very good vintage condition with no chips. 14.1cm tall x 6cm x 6cm. The rim is around 6.5cm wide. Mouth blown and handmade so the glass has natural undulations and ripples and tooling marks. Some slight small marks inside the rim (no water marks).
Free P&P to the UK.