I had a set of 'Mercur' glasses from the same period, with the same cut design as your small vase, which is what made me go directly to the 'Glas Er Liv' book on my shelf.
Lütken did a few cut designs in his early days at Holmegaard - they're still out there, but often get overlooked because they're not signed and/or typical of his later, more famous, designs. But they're often very very nice pieces of glass.