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Armillary spheres featuring an EOT correction are not unknown. Several - of which some serviceable - can be found in The Netherlands.
This article describes a new sundial of this kind.

The sundial has two hour scales. The first scale is a white, fixed, ring reading local apparent time in a limited range.
A second, copper-coloured, scale is moveable to accommodate a fixed longitude correction.
Moreover, this second scale can be adjusted, by means of a disk on the north side of the sundial, for the Equation of Time.
To this end, the disk is grooved and marked with the names of the months.

Design and realisation:
Eugène Roebroeck and Wybe Westra

Revealed:
September 2003

Sundial location:
"Puthof"
Reijmerstokkerdorpsstraat 130
Reijmerstok, Zuid-Limburg

Eugène Roebroeck