Boinas Industrias Tello

Like so many former beret factories in France, some Spanish manufacturers have completely disappeared. Industrias Tello for example, from Zaragoza. 

Only a few bits of evidence of its existence remain, like the 1934 invoice pictured above and the photo of the actual factory taken in the 1930's. 

In the archives of the libraries of Aragon, I found the photo below; the booth of Boinas Tello at an Industrial Fair in 1934.