Other variants of Theseus family were a self propelled gun with an 75mm Schneider-Danglis Y1906 (Theseus V or Theseus "75") mounted on the hull with fairly limited elevation, similar with the Italian Semovente da 75/18. The Theseus V was higher than its Italian rival, but had greater ammunition supply. Among available ammunition were HE and AP types. Power was the excellent and very reliable TSM FM6-2 diesel with 120hp at 2,600 rpm shared within Theseus family.
The Lynceus was an early fire control & observation vehicle for artillery units. It had a telescopic twin lenses optic device from Economidis factory for artillery aiming and observation. Same optic was also mounted on a tripod on ground. One Lynceus was available to every battery of Mechanized Artillery for 8 howitzers plus one tripod mounted back up optic. Both variants had one Hotchkiss/Pyrkal 0.8 cm machine gun mounted on hull.
Lynceus from mythology:
The name "Lynceus" was recycled in 1980's to a series of IR optics by ECON Optics (new name of Economidis Optic Factory since 1960). Several variants produced for rifles up to OTO Melara 76mm and A/A guns 20mm to 94mm.