Muy interesante el artículo. Ya me lo he guardado, fotos incluídas, la verdad es que la foto dice que es el modelo español ("spanish set"), el que muestras.
"The Single Sliding Strap design was never adopted by the British military. As mentioned above, though, Mr. Lethern designed a cavalry equipment for Spain just after the first World War. The Spanish equipment followed after M.E. Co. entered into an agreement in 1919 with Spanish firm La Industria Lonera S.A. (LILSA). LILSA purchased Mills patent looms and other manufacturing equipment from the Mills Equipment Company and set up a new plant in their Barcelona factory to manufacture web equipment for the Spanish military. Albert Lethern designed new web equipments for both the Spanish infantry and cavalry. The new Spanish Cavalry Web Equipment was almost identical to the Single Sliding Strap equipment illustrated in the 1916 patent drawings, with the addition of the special Rifle sling. The Spanish equipment used the hook and loop belt buckle, and in fact, a close look at the 1916 drawings will reveal what must have been an early prototype for this buckle.
The endeavours required to set up the new Spanish facility were long and involved, and only after protracted efforts did LILSA finally begin to produce some experimental sets of web equipment. By 1924, trials were under way, both in Spain and by the Spanish Foreign Legion in Spanish Morocco. Alfred Kruk, in the work cited above, reproduces two photos of the Infantry Web Equipment in use in Morocco, but no period photographs of the Cavalry Web Equipment have yet surfaced. The political situation in Spain during the 1920's was turbulent, to say the least. LILSA survived as a company, but the production of web equipment seems to have never gotten much past the trials/limited production stage. The partial Cavalry Web Equipment shown here is maker marked "LILSA" and dated 1925. This is the only example of the Spanish Cavalry Web Equipment (and the Single Sliding Strap design) that I have seen. It is incomplete, missing the Haversack, Water bottle carrier, and Strap, with keyway fitting, as well as the accompanying Rifle sling. Detailed photographs of the individual pieces are shown on the "Spanish 1920's Pattern Cavalry Web Equipment - Components" page, which can be accessed below.
The Spanish 1920's Pattern Cavalry Web Equipment was the only Single Sliding Strap equipment to actually be commercially produced, even on a limited scale. The Single Sliding Strap patent also presented another idea that would surface years later. The drawing at left, again taken from the 1916 patent, illustrates both a combined Pistol case and Cartridge pouch, for the right side of the equipment, and a combined Binocular case and Compass pouch, for the left. The Mills 1917 Web Equipment, Officers, used similar combined cases. In both of these equipments, the combined pairs are mounted on short Side pieces. Each Side piece has a double hook on one end, to engage the flat woven loops on the Back adjustment strap, and one half of the belt buckle on the other. These Side pieces replace the Cartridge carriers on the Back adjustment strap. This concept, and these designs, would eventually be used, almost unchanged, in the Web Equipment, cavalry, Pattern 1940 Officer's equipment."
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Gracias de nuevo. Un saludo.