Anonymous black hanging lamp (ca.1960?)

It's already been three years since I bought this lamp. I purchased it at La Recova, one of my favourite antique shops in El Rastro in Madrid, one of those places you can become friends with the owners and, as important as the first reasson, one of those shops that offer good vintage design at quite affordable prices.

In spite of its black colour, its having so many slots around gives it an almost transparent look, and the white interior will reflect the light and this will be stronger when leaving the lamp through the many slots... it's going to be wonderful!

I loved the op-art effect I guessed in this lamp... I say "I guessed" because I haven't been able to use it since then, but it seems it will find its place at the studio, which makes me happy as it will get at last the place it deserves... no matter it will be lighting the bathroom :/ LOL

Sadly, I know nothing about who designed or made it or when or when was it produced.