portugues knitting is basicly identical to:
(and many other 'eastern' variations)
this same style is found where ever knitting was introduced my spanish and portugues sailors.. (so its found in many parts of south america.) the spanish and portugues learned this style of knitting before 1492 (and the spanish expulsion of the 'moors' (islamic influence) )
some south americans (a huge percentage) are more norther european immigrants (the irish for one, migrated to Catholic south america in favor of engish speaking but non catholic US) and these immigrants brought 'standard european knitting' (vs islamic/eastern style knitting) --so both types of knitting can be found in SA countries.
the yarn (as you see in the photo) is 'secured' above the hands.
in some places, its wrapped round the neck, in other places, a regular (safety pin) or special knitting pin is used.
then the yarn is threaded through the pin (rather than around the neck)
the pin is pinned on clothing at shoulder or near neckline.
the yarn is keep low (usually in a bowl on floor) and the tension is created just by this arrangement--(rather than by elaborate wrapping of the yarn around the fingers)