Time from something military:
https://upload.wikimedia.org/wikipedia/ ... endent.jpg
In 1931 Hellenic Kingdom evaluated the Vickers 6 ton light tank and adopted it for service. A manufacture license was also purchased, local production started from 1933, called Theseus Light Tank. Some were Type A (Theseus I) and most were Type B (Theseus II), also earlier were converted to single turret. Theseus I (twin turret) had twin 8 mm Hotchkiss/Pyrkal Y1930 and Theseus II a single OQF 3 pounder Hotchkiss (47mm).
A local designed six cylinder diesel engine developing 105 hp (from 1938 a new 120 hp diesel engine fitted) replaced to original Armstrong Siddeley petrol engine from 1935. Guns also changed : 2 types of main gun where used, both from Czechoslovakia, the 3,7cm KPÚV vz. 34 (Theseus III) or the 4,7cm KPÚV vz. 38 (Theseus IV), both manufacture under license. Secondary gun was a hellenic derivative of Hotchkiss Mle1914 in domestic 8x50mm. HLK did received some assistance from Poland into designing the Theseus light tank and also note that HLK bought the Polish TKS tankette and manufactured it under license.
For the larger 4,7cm KPÚV vz. 38 of Theseus III a new, larger turret was developed. Economidis factory developed an tank periscope similar with the Polish Gundlach for the Theseus III/IV), but not copy, it was parallel design by an optic factory. Manufacturing of Theseus Light Tank continued until late 1941.
Gun designations in HLK service were :
(type, diameter/barrel length by caliber/year of adoption as model (Y=Υπόδειγμα)and country of origin if being of foreign origin. In small arms the caliber is not referred.
3,7cm KPÚV vz. 34 = Tank gun 37/40 Y1935 (Czechoslovakia)
4,7cm KPÚV vz. 38 = Tank gun 47/43 Y1938 (Czechoslovakia)
0.8cm Hotckiss Machine Gun Y1926